I don't think anyone in Sherlock is gay. I recall some jokes of ambiguity but Sherlock ends up kissing girls and nothing gay. I don't know if the original Holmes is gay because I haven't read the books. Anyway, it went downhill at an incredible rate and the 4th season is full shark jump dumb as fucking shit. I've never seen a show go from a 9 to a 2 before.
Season 1 9/10 "great" Season 2 7/10 "not bad" Season 3 5/10 "time to wrap it up because clearly you can't keep it up" Season 4 2/10 "pathetic/want my time back"