If you haven't seen any of the series...why are you reading this post? I am nor responsible for spoilers ;-)  That said, the final season was fine.  I think that the show "lost" something by having the final three seasons being release every three years.  The first three seasons kind of flowed together, despite the 2018 "break" between seasons 2 and 3, but COVID kind of kneecapped the series with Season 4 being release in 2022, and the final season wrapping up this past December. I really should have rewatched seasons 1-4 before watching the final season, but oh well.

I think that despite the damage done by filming and release schedules, I think Season 5 wasn't that bad.  I think that it offered closure to the people who've been paying close attention to the series.  I had honestly forgotten about the mind flayer (what season was that introduced again?), so I was quite happy for the little breadcrumbs that the storytellers left to kind of remind the audience of what was going on.

I guess the fans are still annoyed that the main answer to "is Eleven still live?"  Well, does it matter?  If she's dead, she sacrificed herself for the group (which I guess is something you could see in D&D, so it tracks), and if she's alive, she's living the ascetic life, away from the group, because to reveal herself might bring danger back to her friends who are trying to lead normal lives.  I think warrior-monk El has a certain appeal to it, but either ending is fine.

Might need to rewatch the series once I get through some of my other backlog of TV viewing.