I had to Google translate that trust feedback and I agree:

Negative tag is not OK to be given for insults.
Negative tag is not OK to be given as a result of disagreements.


Now.. I see some sort of oddity too.
You are trusting Buchi-88 (DT1), he trusts mr.relax (and makes him DT2) and you distrust mr.relax.

I may be wrong, but I think that mr.relax remains DT2 as long as Buchi-88 trusts him and no matter how many direct distrust we give him.
But if my logic is correct, an idea would be that maybe you also discuss with Buchi-88 review his trust list. After all, I see he's a fellow German and may be more aware of the context too.


Of course, the direct distrust on mr.relax most probably also helps on long term.