Going through reform cards, I see a trend that I do not agree with. It only takes 1 report from 1 person to take it to tribunal. So basically I could play with someone, report them once for 5 games straight and if the tribunal finds them guilty he's going to get punished?

I say it should take at least 2-3 people to report someone in order for it to be sent to the tribunal. You could piss off 1 person in game by calling something out like having a bad position in a fight, they can report you, and it goes to tribunal. That seems kind of wierd that 11% of people in a game can report you for it to be taken seriously.

I call that flawed in my eyes

You need to be reported in 15-20% of your games to ever even see tribunal for the first time.

Reports do not necessarily reflects what is being reported or how many would find it disturbing that the problem is reported.

If someone reports to the police that something has happened that is unlawful they will investigate and take action anyway. The same happens here but only when you get reported in a % of your games so.

1.9 reporters per case? Looks a bit more than your assumption.