Here's my opinion.

eVerso did nothing wrong here. You walked away from an unfinished situation, where he is able to make it finished or not and you can't.
Killing him and leaving is a result of a day or two ban, so you deserved that punishment.
If you find it difficult to drive, I suggest you either stop driving the vehicle, or practice your driving skills in a less densely populated area, or drive extremely slow.
As mentioned, witnesses don't count, video or screenshots do.
eVerso here is only being slightly more harsh than the other admins, if you want to change his actions, I suggest you talk to one of the super/head admins or speak to him yourself, but he has done nothing wrong so far.