I know, I should indeed have waited for the end of the round. I was just annoyed by peoples responses defending these hackers. I used to send clips also but these didn't get any result even though it takes me a lot of time to upload these clips. Also having the whole server reporting a hacker through the in-game menu but that didn't help either.
The only way of reporting that does feel like it helps is reporting them through u/lytlb1t
It sucks that my first match of underground has been ruined by a hacker and now I lost all interest in playing today, this is exactly what the hackers want.