Am i an unreasonable wife?

So when my husband got layed off last year i was a SAHM we decided that we would both look for jobs and whoever found one first could start with the other stayed home until childcare was handled. I found a job first so we agreed i would work 8am to 4pm with only one day off which he agreed (that was the only schedule available), we also agreed he would cook and i would take care of the chores. Then as time went on i started to notice my husband was unhappy and always in a bad mood, he said running errands with our two sons 1 1/2 and 3yrs old was overwhelmed no problem i started running all our errands on my day off but same attitude always in a bad mood. So i just got home from doing a double 8am to 9pm i greet the kids asked if they're showered he said yes so i tell him i would take a nice warm bath not only am i tired from standing all day and yes standing cause i can't even sit to eat I'm also freezing cause its winter. When i get out the bath he's in a bad mood i asked whats wrong he starts to rant "I'm always taking care of the kids, they driving me crazy i can't even take a shit in peace, ect ect ect" I'm standing there like 😳🤔 WTF so i asked him what more then what i already do can i do? I work, i do the chores, i bath the kids once i come home everyday unless you have already done it, i put them to bed unless you let them take a late nap then i obviously fall asleep from being tired i don't know what else i can possibly help with. He says nothing and walks away!!! Ladies i just need advice I'm working on childcare for the boys they have been accepted to a place already I'm finishing up the paperwork now, I've offered to leave my job if he finds one. When he was the one working we didn't have any issues now that the roles are changed he's always in a bad mood and i do understand it may be that hes stressed with the kids, depressed he can't find a job/hasn't been working but i do exactly what he would pay all the bills, gas in the car and spilt the rest in between us both. what else can i possibly do?