I'm not sure what they mean with "freakshit". Despite my occasional ranting in defense of human characters, I genuinely don't mind people playing non-humans. Even the really weird and exotic races. If they have an interesting character concept to play with, they can go ahead and play it with my full blessings.
What annoys me is when they make characters that are literally only the sum of their class, race and pronouns. Or characters that don't fit in the setting. Or when they complain that their highly exotic character is being treated differently just because they are (gasp!) different. People who just want the good without the bad (or worse: the looks without anything else) annoy me to no end, because it's so much more interesting to take the whole package and make it work.
You want to play a Tiefling? A literal demon-blooded creature with magic in your veins? Expect to be treated with mistrust. That's not a problem, either. You can play it off in so many different ways, you'd be spoiled for choice. You could have your character be annoyed by it and try to prove the commoners wrong. You could have your character revel in that mistrust. You could have your character be bitter. They could try to hide their demonic ancestry. Or they could flaunt it. Or they could try to pass it off as a curse. So many fucking options, you could make a whole party of the damn things and have them all have completely different outlooks about their own existence as Tiefling. But nope, most just play them as humans with horns and tails.
Shit, even just playing a bog-standard high elf. You're likely older than everybody else in the party, combined. You don't need to sleep. All other races feel clumsy compared to your natural elegance. You were raised among the trees and the other races' buildings all look crude and bulky to you. There is fey blood coursing through your veins, granting you powers the mundane races don't have. The children of other races might even learn how to handle a weapon, but every child around you was trained in the blade and the bow, with great skill to show for it. Everywhere you go, humans stare at you with awe, fear or envy in their eyes. All together, elves can be extremely alien creatures. But no, everybody just plays them as effete humans with pointy ears.
Likewise, you want to make a character with a sexual orientation outside the norm? Man up and play the consequences. Put some effort into it, you fucking hacks.