I had the advantage of not watching Lost until it was over and I had enough sense of the ending without fully being spoiled that I was not disappointed, because in a loose sense I knew what was coming. I fully recommend it. In fact I would generalize from my experience (which I try not to do too much) and say if you know about the initial negative reaction to the ending you will be somewhat inoculated from your own disappointment.
Separately, I just binged the first season of the AppleTV+ series Murderbot. I recommend. I read the full series of books, which I prefer, mostly because the TV version is not able to fully recreate the wonderful interior monologue of the title character, such as:
"So, I’m awkward with actual humans. It’s not paranoia about my hacked governor module, and it’s not them; it’s me. I know I’m a horrifying murderbot, and they know it, and it makes both of us nervous, which makes me even more nervous."
And
"At least Mensah and Arada had overruled the ones who wanted to talk to me about it. Yes, talk to Murderbot about its feelings. The idea was so painful I dropped to 97 percent efficiency."
They capture some of this in the TV series but it's not the same level. It can't be the same because of the differences between visual and language based art forms. But I recommend both, with a slight caveat that I thought the book series got slightly worse over time.
Also I don't always prefer the book(s). I enjoyed The Expanse more on TV than the novels, and the same is true of Slough House.
Also also Murderbot has been renewed for a second season, but the first ends on a satisfying enough resolution of things so far.