It's been fascinating to watch the opinion of this movie change over the years.
Circa 2003 - Everyone thought this movie was the worst of the franchise by far. Many went so far as to say even taken on it's own merits it's objectively awful.
Circa 2013 - Some people started claiming this movie was actually pretty good. If it was simply Season of the Witch it would possibly be considered a cult classic. The title and expectations for a Myers slasher sequel are what soured people to it.
Circa 2023 - For many this is the second best Halloween movie and for some it's even better than the 1978 movie.
It's the exact same movie as it was back in 1982. It's simply the narrative around it has changed. It's largely groupthink. Enough people champion it and suddenly more people bandwagon. You're now 'allowed' to like it.
Here's a chart of it's IMDb rating history from 2005-2020.
https://i.postimg.cc/rpCPNBMg/Screenshot-2023-09-02-at-21-31-41-IMDb-Rating-History-Graph.png