How do you know what other people talk about in /tell? How do you know people systematically blacklist you? Idk all of this sounds like a lot of reaching to me. Especially after you yourself saying your groups wipe because you keep messing up. Idk, if I was farming something and someone wipes me multiple times in a row, I'd also leave and blacklist. Chaotic CoD nearly filled my blacklist with the amount of prog liars were out there... kinda hyperbole but also kinda the truth
Also, I'm sorry but "after 5 tries it gets frustrating" and "it takes too long to get this mount." Maybe the mount just isn't for you then. Or PF isn't for you. Maybe try to find a FC to do it with, I know lots of FC's that organise mount farm events. Or look up the recruitment discord and look for people who are more patient. Seems more productive than reporting someone who blocked you. Like, what do you even expect from reporting them? That a GM makes them play with you? Not how this works.