Getting the GARO mounts didn't involve anything near "absolutely disgusting" amounts of pvp. That would be getting any of the 1000 wins achievements. Is getting 100 wins a grind? Sure. Is it more stressful than a solo achievement mount? I'd argue that depends how much you let yourself get stressed out when having to deal with other people. It seems clear that pvp isn't your cup of tea, so of course it would seem like the worst chore in the world to you. But as far as the conditions for obtaining a mount go, what they've chosen really isn't unreasonable. Frontlines/Rival Wings is just cleverly disguised RNG anyway.