Would you like an in-game parser?

[Reynhart]

With a Group parser it's on everyone's screen, it's up to the people to use it correctly

Yes, you're on everyone else's screen even if you don't want to.

Last time I checked you said you don't talk about people who has sooo low dps but about those who barely has any dps loss, talk about 50-100 less they could done for example.

Yes, because, every time I faced someone whose DPS was so low it could end with a wipe in Midas 4 at 66%, a parser wasn't needed to point where the flaws where. And, most of the time I was in that situation, the flaws came from the mechanics, not the DPS. For example, people not focusing on add in 1st phase, healers used to tank swap after perpetual vs a tank that is confident about keeping the boss on him, or screwing discoids, people not dodging diffusion ray, etc... Apart from those obvious situation, I can assure you that any DPS who could beat the M4 SSS would not get caught by this kind of enrage.

I have news for ya, many people in trial do 60-70% less than they could do which leads to wipe. Why do people do things and wipe 7 other people on purpose? That's like trolling and you and I both know it is.

Of course it's trolling, since you stated that it was "on purpose"
I doubt it's always that and I still think that a parser is not the best solution for that.