Tbh i think evryone, who plays 3vs3, 4vs4 met this guy already^^
Can confirm. Am 4v4 scrub.
For me the most infuriating random teammates are the tank trap spammers. It's like the just drag the build order across the entire map. They always do it on your side of the fuel too making any type of push impossible.
I remember playing on Steppes with one of these guys. He had no tanks, nothing but rear echelon spamming tank traps and MGs/ATGs positioned not far from the base sector. I wanted to make a push with tanks to flank the mid VP and help the my other allies infantry but I kept getting trapped in by his tanktraps. So I blew a hole in his (by this stage multilayered) wall and rushed through.
The tanktrap guy pinged the part where I had destroyed furiously, evidently pissed that I didn't want to stay within one sector of the home base like him. When my tanks tried to return for repairs the gap already had RE in rebuilding it. So my damaged tanks ended up being corned by a Panther and Pzgren blob.