There is a difference between talking to them about having troubles, it's a totally different thing to bad mouth her.

He shouldnt be doing that, he is tainting any relationship with them. Any problems the two of you have should stay between you two.

Talk to him, don't dismiss your own feelings, but explain them to him.

Clearly you still hold some resentment about him not pulling his weight with the baby. Maybe the two of you can get some help and talk it out before it builds up and exploded again ?

Lmao.

Spent $1,000 on a new suit for an interview, decided to renegotiate with my current company instead. Wore the suit maybe 1 more time since.

Stop thinking that there is such things as "the one". There is basically unlimited number of perfect partners out there for all of us, we just have to find them.