This happened to me a few times. When I see an artwork or a movie that ends with a happy family together ....
That's classic fiction ending. Something like commercial, it's not real life.
Real life family with small kids is tired ever pissed wife, annoying exhausting kids and dead tired father. Little to no sleep, no rest, just zombie like daily circle: work - grocery shopping - house maintenance - babysitting - little sleep. It's the same in every family.
All the fun, adventures and love and sex with hot girlfriend are now only memories.
Well, actually it's not that bad, but being parent is hard life, not fun.
Just trying to cheer you up. Childless life is not bad, you have your time and so many opportunities.
If I was single, I would have sleeping bag packed up on my motorbike happily heading to Siberia and towards unknown with no plan of any kind.