MG it's much harder with two. The limited time you have you are now trying to spread between 2 children and it feels like there is not enough hrs in the day. It's hard to keep everyone happy.
Is it possible to outsource some stuff to help give you a break? Even temporarily? Eg get a cleaner, offload some ironing?
It probably feels like you are going non stop with every aspect of your life and it feels unappreciated I'm guessing. Been there. It does take a little while for everything to fall into place