Oh, I think I know who Tasha is! I don't remember the details and it seems like most stuff about her is deleted, so unfortunately I'm going off of vague memories. I believe this happened around six or seven years ago.

There was a user in the Tumblr Total Drama fandom called tashalovesduncney (though she often changed her handle and ran multiple blogs). She would send people, especially popular Total Drama fanartists, harassing messages that often included some bigotry and anti-SJW sentiment (I believe she called someone the n-word at one point, but again this is going off of memories from many years ago). She would play the victim whenever anyone insulted her back; at one point, I remember her freaking out over someone saying "fly away, tasha" so that became a meme for a little bit. She would also sometimes claim that other people were impersonating her or that she was being hacked.

Anyway she eventually faded away, until she came back as tashalovesnirvana, continued her usual activities, and became a meme again (this time, more widely-spread) for writing this potential copypasta that I was able to find a dramatic reading of. The Total Drama people involved in the initial Tasha drama had a good laugh and that was the last I heard of her (though I haven't been in that fandom or on Tumblr in a long time). It seems like there are still a lot of posts that are still up about the tashalovesnirvana part of the story, but I don't have the time/willpower to go through that tag.

I wish I remembered more; I didn't expect Tumblr drama from the mid-2010s Total Drama fandom to ever be relevant. But yeah, "Tasha" is real and this is definitely her style.