We really haven't. It used to be that gay characters were written as overly feminine, by straight writers bc we were being used as a joke. Actual gay writers in the industry now also write...exactly the same femmy characters into stuff (as someone working on theatre/media industry is quite likely to be a more fem gay).
What I want to see more of before I'm happy: young, interesting gay characters that demonstrate their love for one another without it being a Big Deal, that don't get killed off or only play a minor role.
Atm all the gay characters I see are: * Older men * All femmy, not just average dudes * Get killed off/removed from the story quite quickly * Are labelled as "gay character" but they aren't really shown being gay (making puppy dog eyes at cute guys, or having a boyfriend, etc).
Also lots of shows take shortcuts by having a lesbian character (which is also great to have), but gay men are still far less accepted by society/in media at this point. People would rather see two women kiss on screen than two men.