The grind is the problem. You need tons and tons of AP, you get time-barriered by the class hall for 2 legendary equips instead of 1, said legendaries and that BS 'bad luck protection', and if you even get a legendary that isn't just an expensive paperweight with stats.
I quit some time ago, permanently, from my perspective, it was mostly the afforementioned grind, that is then led into the fact that you will never get back up if you fall behind or get unlucky, because people demand way more than what's actually beneficial. If I wanted to pug mythics to at least try and put in some effort, I get declined over 20 times in a row, even on the ones were my ilvl passes. And those are few in-between the "LFM M+2 must have 865ilvl + legendary"...for real? If this is how the community wants to do shit, be my guest, but it's your problem that you can't find people then. And even then, if I made my own group, there were often the case were some queen of a player would just up and quit mid-run because they didn't like the pace, thus wasting my key. Or if there were hitches, which tbh, I expect when it's a pug, but as long as we beat the timer, Idgaf, and I make that clear in the recruitment.
The mentality's just fucked...
It's way too much work for not nearly enough gain. Fuck it.