If I get 3 losses in a row, I switch tanks. If I get 6 in a row, I most definitely seem to be a lot more aggressive and less cautious. At that point it doesn't really seem to matter what I do. If I die quicker then I can do other stuff. until the next battle.
Personally I feel like they should make the daily vehicle bonus for first top 7 finish on your team rather than first win. I want to be rewarded for playing well and trying hard, not for being assigned to the right team. The current system encourages rage against teammates and YOLO behavior when it should encourage everyone to play their best. While playing well does include working as a team, getting stuck with a team of less experienced players doesn't have to make you bitter if you get rewarded for how you specifically play.