For me it's not that I think she gets too mean or too cocky it's just that she becomes a really boring housewife/mom, and there's nothing wrong with that it's very realistic but I don't HAVE to like every character and their development. Same thing happens to Jim like when he brags about being home from New Years by 9, they're just a really boring couple once they get together. Every A/B plot after the wedding is just about how in love they are.

I dunno I'm just so over sitcoms starting all zany packed full of shenanigans then slowly becoming real life over time with everyone becoming boring spouses and parents. Like even Dwight and Angela had most of their flaws and craziness wiped away once they get together, like they're suddenly a loving couple and friends with everyone. It's why I respect the hell out of shows like Community or Seinfeld, they could've gone the "feel good" route at any time but instead they doubled down on the flaws and craziness before settling on a realistic ending bittersweet ending.