A lot more men than women are able to be content with the comfortable mediocrity that is bringing in the paycheque, doing the chores, getting laid once or twice a month, but otherwise not really feeling much passion or enthusiasm or joy with their partner.

It's not the life you hope for, but there's a lot of social messaging that that's just the way it is, it's what you signed up for, you would be selfish to leave, the grass won't be greener, and also it's probably your fault anyway for not being a better husband. The messaging to women in romcoms and the like is much more toward you deserve better, be brave, junk the loser, go get the life you want.

As a guy who was in a mediocre marriage like this for many years, I basically got my emotional needs met elsewhere: through work, family, friends, time and activities with my kids, etc.