I think it's a bit weird how Lisa gives such extreme feelings from people here: Either threads being about how they want to fuck her brains out or blow her brains out. Often both.
Lisa at the end of the day is more of a consequence of the downward spiral the show has been going for literal decades now. Yes she is an annoying cunt now, sure, but every character in the show has become unlikable and awful. Yes her role as political mouth piece is awful but that's no different to how the show itself has now been surviving off current trends and celebrity guest star episodes. Is "Lisa goes on about [Current SJW Controversy of the Month] really that much worse than "Homer sucks [Insert Celebrity Guest Star] cock"?
I dunno, I think people are just trying to find "the secret sauce" to why the show sucks when it really just boils down to hack writers. And the overt hatred of her is especially sad when she used to be a good character, like the other members of the family.
Lisa sucks because everyone sucks because the show sucks.
Want Lisa to be good again? Get none shit writers and make the show good again.