A lot of modern remakes become "demakes". Often a remake focuses on surface level improvements, like graphics, but damages the underlying game systems that made the original beloved in the first place. Another common problem is lazy graphics upscaling that improves the resolution but makes the result look cheap or incongruous with the game's original style (GTA3 remastered is a great example[1]). I think there are a handful of truly great remakes a bunch of mediocre ones and a surprising number of total disasters like Warcraft 3.
But probably the worst trend with modern remakes is taking the original games off of online stores or "upgrading" them to the remake thus making the original unavailable. Combined with the "demakes" trend above and it seems like we're actively destroying many historical games with these "remakes".
[1] https://www.digitalfoundry.net/articles/digitalfoundry-2021-...