My problem is, I want to play Big Team Infinity Slayer, I just hate how people play.
Here's your problem: You are going in to BTIS expecting people to not be raging idiots. If BTIS was AI controlled the settings would be considered 'Very Easy'. --- What do I look like Mr Frank-****-For-Free? No doe, Hoe? You can't **** with me THIZZ IZ WHAT IT IZ -- GT: Spidux
I would do as others previously mentioned, carry a plasma pistol. Assuming you stick with BT It really is your only solid counter to vehicles beyond another vehicle or power weapon, both of which are sketchy when it comes to their availability.
Another suggestion, is to simply stick to areas where vehicles can't easily reach like the tunnels and smaller rooms, but good luck pulling that off on Ragnarok with any real success.