If people beeline to opponents without a strategy then that is called not playing well and being free points for your opponent. There are plenty of strategies in PvP in this game and if you don't have one in mind that isn't the game's fault. Your strategy may taking out a straggler, using your burst then running away, using your mitigation and invulns as a tank to bait the enemy to attack you while everyone else takes them out from a distance, circling around parts of the base where the enemies aren't gathered at to complete objectives, holding a burst or limit break until a certain moment, running out to bait enemies then running behind your team when you get weak, using stuns at the perfect moment to allow someone to be taken out, knocking them away was a common one (did they remove this? not seen it for a long time).

If you aren't thinking things like this then it's just not the game's fault and I have been just as clueless in other game's pvp. You are either trying or you are not.