I'm reading this thread with interest as I am the main earner but hold no resentment at all towards my DH so I'm trying to work out what is different in our relationship that means I'm more relaxed.
I earn roughly 3 times DH and really love my job. DH, by comparison sees his job as a means to pay the bills, isn't career focused or ambitious and doesn't really enjoy it.
I pay the majority of the bills including mortgage but am still left with more disposable income. But although we don't pool our money, we both see it as a family pot. DH pays only a handful of bills but is also a much more savvy saver than me and ferrets away a lot of his salary, whereas I don't save at all.
His savings have actually just paid for an extension. We don't keep tabs on who pays for what (mostly it's me that pays for meals out, family days etc). But I find it's usually my idea to do it whereas DH is happy to do something at home. Any big purchases always get discussed and will come out of the savings he accrues-he never dips in without a discussion and I know what's in those accounts.
I think we probably split household chores 50/50 but I do more childcare pick ups and take days off when needed-this is more to do with job flexibility though. I can almost chose my hours and have far more holiday.
Perhaps if we were struggling financially I would feel different but from your posts you say you aren't struggling (unless I've missed it) and he does do more around the house.
I can only conclude the main difference is perhaps attitude. My DH is very careful with money, always takes charge of switching for best deals, remortgaging etc, is the sole saver and does a lot of the house admin. I would say I do all family admin but we split the rest 50/50.