Not quite sure

[Joey899]

Been married about 8 years now, things started great but over time I’ve noticed a massive change in my wife’s behaviour and how she acts towards me. Manners are important to me and regardless of who you are speaking with I always think you should say please and thank you, my wife doesn’t and she says in our house we don’t need to say it to eachother but when she speaks with others she will, the majority of things have to be on her terms and she will always guilt trip me and if she doesn’t want to do a minor task around the house she will kick up a fuss (nothing major but small general things) we don’t argue much and it’s normally the odd bickering but occasionally she will say she doesn’t want to be together and thinks we should go on a break. The last time this happened I said if we go on a break it’s us splitting up not a break and she then changed her mind saying she was just in a bad mood.
I’ve started to notice that she might have 2-3 days a month where she’s actually happy and we are in a great place but the rest of the month is stressful which she puts down to her periods.
She insists all women are like this and it’s not just her and if we were to split up I’d have exactly the same problems with the next person I met.
Keen to get other peoples opinions but I just feel like I’m constantly being manipulated and made to tread on egg shells

Yep, you’re being manipulated. Move on.

Have you tried couples counseling?

For one, I don't think that every disagreement or bad mood should lead to saying we need to separate or go on a break. If she means it, then your relationship is in very deep trouble. If she doesn't mean it, she's being manipulative. Either way, it's bad.

Second, you're bringing up a few rather vague things like how 'she doesn't have manners' or she will 'guilt trip' you and 'kick up a fuss'. These are your interpretations of what's happened. This is the label you put on it, not the actual behaviour on her side, nor the context in which all of this is happening. It's very clear from your post that you feel like the victim of her moods. And I'm not saying you aren't, you just haven't given us much actual information to work with.

If she is behaving irritably the majority of the time and not communicating about the underlying reason, then that's obviously not the best way to go about things.
However, without excusing her behaviour, have you just decided that she's unreasonable and in a bad mood for no reason whatsoever? Or have you wondered why? Has she maybe tried to communicate how she feels in the past? If so, how have you responded to it?

I'm not saying this is definitely the case in your situation, but I have a feeling you're seeing yourself as the victim and you're seeing your wife as the offender. That takes away every bit of responsibility and accountability you have in this dynamic. It also ensures that you have zero willingness to actually listen to the concerns and maybe valid criticisms your wife has to share.
Again, this doesn't take away the fact that your wife shouldn't be communicating this way either, but you're probably both pointing blame at each other rather than seeing it a a shared problem that takes effort from 2 sides to handle.