I'm not sure there is much of substance to evaluate. If we fired every technical lead who sometimes "waded into areas with no experience," issued orders, followed a conviction or two and occasionally provided disparaging feedback, there would be no good engineers left. The bullying and devaluing claims are worth investigation, but that's always very subjective and range from "my boss disagrees with me" to horrific abuse.
Yes, but does that make it any better though? We understand why they have to do it anonymously, but it's still someone with nothing at stake, who we can't evaluate the claims of.