OP I was initially slightly on your side, but you've gotten ridiculous now. You are clearly seriously resenting him. Honestly I think it's because your life was pretty easy when you were a SAHM with two kids at school all day and so you didn't mind this stuff, but now you have the baby you're having to do more and so it's irritating you.
Of course he shouldn't be leaving his cereal bowl on the coffee table and expecting you to clean up after him (or whatever). That's not ok even if you're a stay at home partner with just a doodle. It doesn't seem that you've actually mentioned it to him though, so whilst in theory he should know this is ridiculous, you silently seething about it and not telling him is completely on you.
Also, I know everyone says 'but he should spend time with the kids on his time off' but I think it's completely fair for you to say 'I'll take the kids out for two hours and be the fun parent, you clean the bathroom'. Again though, you need to have this discussion. What you can't say is that managing the three kids for 85% of the time he's home is not doing much, if you want to claim that you are massively overworked when he's not around - either it's easy to amuse them and you're just picking up some housework around the edges, or it's hard work!
I don't think you have it hard though - a 9 month old isn't massive work, and your other two should be very little work and at school all day. I'm not saying you have it easy, but seriously your list of how hard your day is is pretty laughable. These are not hard things - boring and monotonous yes, but hard no. You actively choose this life by choosing to leave work when your first was born and you have admitted that is what you always wanted. This isn't a case where you've been forced to be a SAHM because you couldn't afford childcare. There's been no suggestion that your DH has ever stopped you going back to work. If you don't want to be a SAHM anymore, then work on how you change that - it's not your DH's fault that you haven't worked in 8 years and can't jump back into your old high flying job! Then you can start to talk about it needing to be 50:50%.
Your attitude to your DH's contribution to your family is pretty poor. I don't think pilots are some special beings, but he is short haul so the job is pretty intense. (We're not talking long haul and rest days in 4* hotels with no family commitments!) and you're complaining that he doesn't put a load of the kids' laundry when he has 9 hours at home including sleep before his next shift. You need to remember that this is the life you wanted. If you don't want it any more, of course that's fine. But then you need to change it. If you want to stay as a SAHM then you will be doing the vast majority of the housework, because that's the job (except for the period where there are tiny kids in play/3 under three etc - different ball game). Talk to him about some of the things that are upsetting you like cereal bowl and him being the 'fun parent', but if you don't decide to either accept that (overall) this is what a SAHM does, or decide to go back to work, but instead just continue to be pissed off about it all, then you're heading for divorce. And I promise you it will be harder as a single mum.