Your comment is literally pure, unexplained opinion.

I regularly find Wikipedia entries helpful and factual. How is that terrible?

"Terrible" might be a little extreme but it's a little hard to argue that Wikipedia has not seen better days. The moderation culture has seemingly been taken over by deletionists who seem more concerned about some arbritary metric of "notability" than if an article is of high quality.

https://www.gwern.net/In-Defense-Of-Inclusionism

Broken links on some references

Plenty statements with citations that don't really support the claims made directly but instead paraphrase the claims in the introduction of some paper (turtles all the way down)

Article size has grown whilst increasing noise to signal ratio (I guess you could call it an opinion)

Influence by certain groups with a selfish interest in editing the content, and more authority given to established editors

Those are the ones that come to mind at the moment