Using game mechanics such as path blocking, or path redirecting is a game based skill. Learning how pathing works is very crucial in the game, and is constantly used both for and against you. Take into consideration tanks for example. you see most of the time people will use them to move forward or backward in a lot of maps.
more intensive work such as blocking paths via wire, sandbags or trucks are also very well known, and in rare cases when it works other vehicles blocking paths is also a known play.
I understand that this post was more because you were upset you lost a game due to something "cheesey" but it's how it is.
Now if your ally had done it, and assuming it's an ally, since you hadn't specified, then you just rolled a bad team mate, and when it happens to be this, just don't waste your time, and just leave the game. people are assholes, treat everyone as such until proven otherwise. this way you are saved the disappointment. just don't be an asshole yourself
1. I won the game
2. Understanding & using game mechanics are different from "exploiting" glitches. Are you also positive to multiple insta building of sandbag/trench top blocking vehicle path? If so, we are on a different page here, and I have no intention to persuade you or be persuaded.