I didn't have any glitches when I played. It's true that the plants seem to win more, but it comes down to who you are teamed up with. Good players are simply good players and can vanquish better, but you need a few of them. Not just one or two on the team. Like team vanquish you have to revive to take away a point from the other team. If you die by exploding, it doesn't count towards their 50 vanquish. You have to be vanquish by a player to count.
Oh yeah, just an advise. Don't revive teammates when there's an enemy near by or you're being hit by enemy fire. Get out of there or you'll be an easy vanquish for the other team.
