Why can’t I get on top of things?

[Times10]

I don’t know if I’m just lazy, unorganised, inefficient or if it’s something more, but I just can’t get on top of the housework. I’m a SAHM with 3 DCs (2 are school aged, 1 baby) but the house looks like a mess all the time.
I can’t seem to finish jobs, and by the end of the day you couldn’t tell I’ve done anything, yet I do do stuff, but a) not very efficiently it seems b) it never lasts c) I never get the whole house done d) it’s really making me feel down and useless. I mean, I should be able to do this stuff, why can’t I?

ps didn't mean to say it won't be easier until they're 10-12 just that mine are now and I don't know when it happened but my life and home are very different to when I had three toddlers!

I never have my entire flat done at the same time, its just not possible for me without driving myself mad!

1 school aged DC and 1 toddler DC, so when I get the housework done the toddler follows me undoing it all.

I've found the organised mum method is good for keeping things clean, each day has a different room that is deep cleaned, hoovered, dusted, beds changed, towels washed etc. Our flat will never look like a showhome until the kids leave home, but despite it being cluttered, its not dirty.

Monday living room
Tuesday bedrooms
Wednesday Hallway and stairs
Thursday kitchen
Friday bathroom
Weekend is just for basic everyday housework and tidying

And don't forget that a home is for living in. It shouldn't be 'done'
It's like an in-tray in an office/ there's always something to be done.
I also like @mommybear1's suggestion of working out what matters to you and focus on that.
I like Flylady for the 'being nice to yourself' mantra. I find her habits stick better for me (clean the loo every morning, take a load of washing downstairs every morning, set out your clothes the night before) so these routines become second nature.
If it matters to me personally then I'm more likely to do it and it makes me happier overall

Im a single mum of 2 but one is almost 18 and the other 4 and I work part time so out the house 3/4 days a week and i still struggle to get on top of things at times. Dont be too hard on yourself! I write lists of jobs that need doing and try to do a least a couple each day, and just learn to feel occomplished at that and not defeated because I've not done the whole list in one go. Little and often is the key, but throwing young kids into the mix is always and added challenge.