People who always big themselves up..

absolutely this, saves a family argument and brightens up your interaction with them. The more overblown the praise and the smaller the thing the better. Congratulate them on their choice of toilet paper, bin bags, how they tie their shoelaces.

If they make a sandwich "my god this is the best sandwich I've ever tasted. but then you've always been an amazing cook db. you could have been a chef. What spread did you use? Lurpak! Of course, you're not like those idiots who use butter. This is why you're a genius...'

People I know who do this tend to be very wrong about themselves.

I'm so easy going = Extremely uptight person.

I'm so good with children = You were a terrible mum

They are trying to convince themselves more than anything.

Same but ex colleague now. Everywhere she went people bigged her up and told her how amazing she was and how lucky her family were to have her (I’m sure none of this happened). I could go on but it was so relentless and bizarre that anyone else who worked with her would def recognise my description. It was pure cringe

@Fozzleyplum , that’s hilarious! I’m using that !

I do know a number of people like this , one woman said , oh my husband earns 50k , the following week it was £65k ! Pretty impressive increase
I just inwardly roll my eyes , but now I can think figjam

This family… sounds like no one likes anyone (apart from maybe your brother and SIL liking themselves!)

DH and I refer to people who do this as "figjam" (fuck, I'm good- just ask me).

Boasting and/or humblebragging is a great way to alienate people and lose friends. It's the lack of self-awareness that amazes me. Luckily these sort of people now use Facebook and Instagram to do it, so the rest of us can ignore them. But it must be trickier if it's your relatives!

I think that’s fair. I mean, it’s in a way far less irritating than the kind of performative self-deprecation that requires you to contradict it immediately, just because it doesn’t require an immediate response from you. When DS was a toddler, I used to attend a baby group where the adult conversation went as follows weekly:

’Cake?’

’God no, look at me, I’m a WHALE!’

Pause for the expected responses of ’You’re not, you’re TINY!’ ‘If you turned sideways you’d disappear!’ Etc

See also ‘I like your top.’

’This old rag? 50p in the charity shop ten years ago!’

Etc etc.

Yes someone I know automatically sprang to mind when I read the OP, one of my daughter's friend's mum.

She acts and talks as if she's wealthy, successful and drop dead gorgeous although none of those things are true, alas. She's always boasting about her designer handbags and dinners at swanky restaurants and looks down pityingly on the rest of us mere mortals. She has often told me that people are "so jealous" of her and her wonderful life. Yet she works in a shop (nothing wrong with that of course) and is always begging lifts because she can't afford driving lessons because she blows any spare cash on designer crap.

She never shuts her gob long enough to take in anything about anyone else, so just floats around in her little bubble where she is queen of the world and everyone else is her adoring subjects. The lack of self awareness is astounding. Sometimes I almost admire it as it obviously works for her!

I dont people big themselves up i have never come across sure it must happen but I just share information with people and they do with me, I don know some people who have some weird inferiority complex and come up with deliberately finding fault in others to try and balance issues they have within them themselves

I have a friend who tends towards this, but she does it via other people, “X said I’m looking SO amazing”, “Y was amazed at how well I did that”.
She’s insecure. I love her though.

Why is it hard to take how other people describe themselves?

It doesn't impact you one bit, its not like they are saying "I always get on with stuff NOT LIKE YOU, YOURE A LAZY LAYABOUT"

Positive mentality, "bigging yourself up" - has huge mental health impacts, its the first thing said to stop being negative, look for the good, celebrate small wins...

So instead of having on them, seething when they speak, why don't you focus more on you rather than what they do. You might be happier.

If not, just stop associating with them, you obviously don't like them, so you'll be doing them (and yourself) a favour.

I see this a lot on LinkedIn too

"Delighted to share" etc

There is a father and son in h's family like this, 'the big men'. NC with them through choice although other family menmbers treat f as if he's god and his s is god in training.
Both are utter twats.

Ignore @Fingerpie. They are a recurring poster who always posts under a different username and always is goady and annoying and asks the same question again and again. It is beyond annoying but the best thing to do is just ignore them.

SIL also says brother needs more respect as he’s the first born son. I find that a bit grating…

See, I think this invites some gentle piss taking. I would be talking to/about other first-born sons nearby (do you have one?!) and start ribbing them (with their full compliance!) about how much respect they should be getting.

I have met a few people like this, but actively avoid them and wouldn't choose to spend any time with them!

It shows a monumental lack of self awareness!

I mean he is going to take on the family title and estate when the time comes so of course he’s owed the respect that the genetic lottery affords him …🤷‍♀️ 🤦‍♀️

Just change the subject OP or perhaps discuss whether humility is reserved only for those much less intelligent than themselves…

One of my DC's mums is like this. I feel really sorry for her as she is so clearly insecure but it's also really grating and irritating. She is also obsessed with designer labels and I think that also comes from insecurity. She evens posts on instagram if her boss says something nice about her at work eg "my manager at the internationally renowned global company I work for said that I'm so organised [tinkly laugh] and he doesn't know what he would do without me [tinkly laugh]". It's so cringe.

Bigges??

I do, but I look past it as they're big positive people in general. They big up the people around them too.
It's refreshing, but I don't want to live with them.

My PIL are like this. They can talk for hours about how wonderful they are and never notice when others stop responding and look bored.

30% of my team have ADHD and they're all like this, constantly hyperfocusing on their achievements & on Linkedin. Also, they don't like to take responsibility for errors and shift the blame on others. You'll never get an apology from them; mistakes will be framed as 'if you didn't do that in the 1st place then I wouldn't have done this so it's your fault'.