I wouldn't have minded so much if Homer stayed at the preScully levels, but Scully even made Homer even dumber and made him a jackass on top of being incredibly dumb.
IMO, Marge doesn't nag ENOUGH and her character in these past few years has become stupider in order to make her relationship with Homer seem even slightly plausible.
NEWSFLASH: Kids always have and always will talk back to parents and Bart was doing even worse things in the 90's (like having a fake licence and cohersing Martin to rent a car). Yeah, it wasn't realistic, but it passed off as being entertaining, unlike the modern Simpsons which is always unrealistic, but hardly as entertaining as the stuff from the 90's.
Exactly, and that's why everyone's favorite moments were from the first 10 seasons! As you like to say: ZOMG!