I'm always surprised when people have such a visceral reaction to anything. There's what, 20? 30? Proper big marvel movies now - are they all terrible? I literally can't believe that - yes, they are not high cinema, but there is enough variety there that surely you can't describe all of them as terrible. Unless I don't know, you just hate marvel and all their characters?
There is no real objective measure of a movie's quality. However by the standards we do have such as Rotten Tomatoes scores from critics, the Marvel movies all range from fine to great with the lowest RT score coming in at 66%. That means even in its worst installment two thirds of people that professionally assess the quality of movies had positive things to say about it. I don't think people appreciate how difficult that is from a quality control standpoint. For comparison almost half of all James Bond films failed to reach that 66% mark.
Someone who thinks all Marvel movies are terrible either isn't giving them a fair chance or is simply out of step with popular culture.
Now if you want to open it up to the general genre of superhero films, there are plenty of terrible movies in that group.
So I don't think they are at the point yet of just cranking out derivative shows and movies based on the same template.
That show didn't even feel Marvel-themed, it felt like it was just set in the same universe. The show is super gritty, dark, and realistic. Feels more like a high class thriller than a superhero show. Which it imo isn't, because the only "superpowers" I've seen in S1 are being good at fighting and a blind person having sonar-like vision thanks to enhanced sense hearing.
https://en.wikipedia.org/wiki/Legion_(TV_series)
Both very much the same template.