With the amount of addon users, GCD hacking, and infinite sprint hacking (Literally the same ninja I have seen in season 1 is still around unloading their entire kit in 1 second and killing people, and I took a break lol).
Assuming you are losing every game, the first row takes 5 games to gain one level, and if you are winning every game 4 games every level. Each conflict game is 5 minutes (usually, some have some overtime shenanigans. Some games half the enemy team AFKs or half of your team does.). Which means on the first row of the battle pass alone you are probably playing on average 45 games.
Which is 225 minutes, or 4 hours (rounded up from 3.75 hours) of dealing with infuriating things. This number goes up for the tier 2 rewards, cause it goes from 3k experience per 'not battle pass' level, to 4k, and then t3 goes up and you get the drift.
Considering it is a competitive player versus player game mode with no power influence over the character this gets bad real quick as well. Not only are you dealing with cheaters which makes the game unfun for both sides no matter whos side they are on, but also you get people who don't even try. The black mage who sits in the open casting over and over not even attempting to move away from 3 people running at them, or worse the 3 people you get that just hold W into the enemy team and die over and over.
TLDR: There is just too many infuriating bad player behaviour issues that make grinding the pass incredibly unfun. This isn't even including the actual PvP balance itself.
Flame away.