I'm rather indifferent about the whole thing, so don't take it as me being die-hard on either side, but I really think you can't argue these sort of things anecdotally.
When you do it really comes down to you having a problem with a specific person, or types of characters, rather than an entire society or loveuality.
I personally haven't known many non-heteroloveual people who are in your face about who they're shagging, or what they want to do to other people, or are completely love focussed and vulgar. Although I see that sort of personality in the media a lot.
But I have seen a lot of heteroloveual people who are equally in your face about what they like. Just vulgar statements that aren't civil and don't need to be shared. As much as I don't want to hear about how you'd like a go at another bloke's bum, I don't want to hear about how many times you've eaten a girl out. It's just crass.
I have a problem with those sorts of people, who have no filter to what they say, and can't be civilised.
I think the mistake some people make is that they know a few lgbt+ people like that, and see things like lgbt+ posters and rainbow flags about, and think it's empowering more people to be as uncouth, or they just assume that all other lgbt+ people must be like it.
If you have a problem with a person for being flamboyant or too loveually explicit in what they say, then criticise them for that, not for the gender they're attracted to.