Is this a fair split?

[Confusedorabused]

I work full time, due to commute leave the house 6:30am get back 6:30pm. DH works about 15hours/week on evenings after I"m back home. If it makes any difference, I make pretty much all the money to support the family.
Things he does every day: school run, takes care of kids (5yo and 8yo) after school, cooking (but leave all mess on counter: egg shells, onion peels, dishes)
Things he does ad-hoc: DIY when needed, garden in Summer, bins out (probably 50/50), wash pots/pans that dont go on dishwasher (I probably do around 60% of that though).
Things I do every day: kids homework, bedtime, dishwasher in/out, clean kitchen (counter, floor as there will akways be crumbs even from breakfast), laundry (there's loads as his work gets clothes dirty and kids are small), washing pots/pans (60% of that), bins (50/50).
Things I do ad-hoc: school projects with kids, school admin (pay for trips, all the "dressed as something" day, "collection for charity" day), checking new providers of internet/insurances/renewing mortgage, buying kids new clothes/shoes and donating old ones, birthday parties (our kids and their friends/buying gifts), doctor/dental appointments.
I think have it much worse (I'm always exhausted) and have tried talking about it in every way imaginable but it never lands. It only started to feel this way after we have kids...
For the house cleaning we have a cleaner once a week.
So:
YABU: It may be a bit unfair but he pulls his weight
YANBU: I wouldn't put up with this.

There’s at least 6 hours between those tasks where he’s doing absolutely fuck all

Sounds like my exH who claimed in divorce was sahp (and not a lazy self employed freeloader) and made cooking one evening meal and doing f-all else sound like a full time job. He would cook but trashed the kitchen so much it took me longer to clean up than cooking myself would have taken. He would then sit down and leave all evening care dc to me.

My hunch will be he won’t change at home and your best bet of staying together is for him to get back to fulltime paid work and use the money for childcare etc. not everyone has the motivation and discipline to pull their weight left to their own devices at home. Resentment is a huge marriage killer.

If you did split and he has low wage it’s going to mean you sharing all the results of your hard work with him, your pension etc.

Is he earning at least min wage x 15 hours or is his evening work just a piss-take vanity project / excuse get out of helping at home ?

Remind me of my ex husband. He was unemployed for a few months and I’d come home from work after dropping our kids off to childminder and crèche, working a full day, collecting them from crèche and childminder, and he’d be sitting at the kitchen table with a pile of books on the table, on his laptop, surrounded by the bread cereals and dishes, claiming he was job searching online all day! He wouldn’t have even emptied the dishwasher I’d filled the night before!!!

This will be the end of your marriage. The resentment will build and build and you won’t ever want to fuck him (why would you? He’s a lazy twerp and you’re exhausted). Time for The Final Conversation about what needs to change and what happens if it doesn’t.

Blimey.

He only works 15 hours a week. Is at home all day while the kids are at school and somehow you still end up doing the majority of everything? That's not on at all.