You know what I do when I get kicked from a party due to my poor performance? I move on; join another party or just take a break. This is something you're going to have to learn to get over eventually when doing anything with other people. Unless you have the ability to select who you play with (which you do) you're going to run into toxic people sooner or later so just learn to deal with it. This applies to many other areas outside gaming such as the internet, group projects, gatherings, jobs, etc. Having a useful tool not be allowed because some people can't handle being told they need improvement is punishing everyone for the problems of the few.

If you are actually being harassed after being parsed: blacklist the person, report them, and leave the group.