If I see obvious sandbagging, I usually punish the sandbagger ruthlessly.
Video record and report. If they did that long enough to get crows I'm sure the devs will ban their ass.
That is reportable/bannable. I will say I go for the sandbagger person, it is my instant way of punishment... Sadly, killers will choose to take advantage - if you were hurt, or go for you... but I like to think most will just purely go for the sandbagger, as I do.
I would say killer coming should hit them, but with dedicated servers, I have seen time and time again, the killer swings and it literally goes thru the person "body blocking" and hits the other person... I don't even know how that's possible.. but it has been happening.
Sorry that happened. Absolute toxic behavior. I think ppl just get bored and are looking for a laugh. Unfortunately it frustrates the rest of us. Good luck in the future bro.