Honestly it's about as ridiculous to say you're done with 'gay-themed movies' for that reason as it would be to say you're done with straight-themed movies because you don't like romantic comedies or were unfortunate enough to see Gigli or something.
There's much more of a variety now for and by gay audiences. Because you're right – for a while, you could only hope to get any sort of mainstream notice by putting ridiculous tragedy in your movie, almost as if they were trying to prove 'gay' was a misnomer. Anyone who grew up around that shit in the 70s through the 90s got sick of it, and by the time we actually had movies like In and Out, it was like a fresh miracle. You are definitely not the only one that hates the obligatory tragedy shoehorned into gay stories. It's an old chestnut I wish people would toss out.
But basically the original post here seems to be taking everything, lumping it into one bag, and deciding you hate it because it has the gay aspect to it. If you don't like tragic movies, don't take the time to watch them. It's not like this information isn't out there; you can look up keywords on imdb or look up reviews that tend to mention a film's major genres. If you don't like wacky youth hijinks, don't watch those movies…but it just seems like you're not pleased with anything right now. And I get that. It can really burn you to get into something you hope will be different, but it ends up being just another flavour of the same.
And yeah, there are vastly fewer gay productions than there are more mainstream ones. But there are loads of fantastic movies, series, books, comics, music, everything for and by gay people.
You have a whole lot of resources at your fingertips. Don't go in uninformed. Maybe you don't like spoilers, but you can still get the idea of whether something will or won't be your cup of tea without spoiling yourself. And at least in my experience, hearing about something, even if you do spoil the entire plot, is very different from watching a movie or reading a book.
Life's too short to waste time on things you know you aren't going to like. It just upsets and provokes drastic statements like this. Save yourself a lot of grief and annoyance. Just do a little reading first. Maybe ask some friends who know your tastes what they think you might enjoy, but always make the ultimate decisions yourself. There's so much out there, even online -- all kinds of creative stuff that people make independently, too, that stands a far better chance of giving you more what you want. Check it out! There's a world to be discovered.
Don't lose hope! The whole creative landscape is changing. It's just slow.