Best wishes, chin up, its does become good.
At the end of the day its you, the missus and the kids. What works works. Food in the tummy, roof over the head, cuddle from mummy and daddy thats successfull parenting in my view. Forget the dont do this, dont do that, do it this way, do it that way, each and every little bundle is their own joy. Not even close to failures as parents. You have not stuffed up enough to have failed yet!!!!
We have been there done that too. What did work for us may not work for you. The "gug" served its purpose and Miss Jedi came off it rather quickly in then end as we were first time bad parents for using a dummy, so what!!. Yes we bribed her too, simple. Shocking to some I know.
Please support your wife. It really is the simple little things, hour sleep here, load of washing there, daddy's turn at bath time. Your wife must have free time to do absolutely nothing as nothing is when her brain recharges. Some to listen too, not tell her all her faults but someone who listens in a non judgemental relationship. Support is your actions. 4 years of post natal depression and sleep deprivation is my sorry tale after 30 weeks emergency delivery. Its a hard slog. it aint easy, youll wonder why you did this more than once. There is no instruction manual. Sometimes you just have to close the door. Make sure they cant hurt themselves and eventually they run out of energy. Sometimes that goes for Mrs Jedi too.
Dont be sucked in by "other experts". Good family doctor is essential, leave Mum's stone age times of when I was a kid behind. It was 2002-2006 not 1969. Mum got her knickers in a knot a bit but thats over too.
Jess is seven now and I wouldnt not have either of them for anything, nor would I not have anything we have gone through. Someone earlier said they become human at six months. Soo true, they then become little people at 2 and then start school WOW, thinking caps on.
Good luck and warm regards
Mat