it should be banned as being used as a source for anything serious.

no one uses it as a source for anything “serious” anyway. unless your definition of “serious” includes social media debates. Anyone who has ever been in school has surely had a teacher tell them "wikipedia is not a source".

Remember - the co-founder of wikipedia says that it has "abandoned neutrality" and has been taken over as a tool to push political agendas by one side.

so what? he’s also anti vax. why is the co-founder’s opinion on this any more relevant than anyone else’s? the guy is not involved with wikipedia anymore.

you could also frame this as saying wikipedia stopped trying to maintain a false balance. if evidence on a topic supports one side more than the other, both sides should not be given equal representation in the article.