I've heard of Blind but I'm too chicken to give them my work email address. Can anyone on HN testify to having done this? If so, aren't you concerned that your employers can see you're using Blind?
If I had access to senior management, I would probably escalade the attacks that I read about are likely issues: communication, priorities, empathy, etc. I actually do that quite a lot with my own manager: “last meeting, you really said hurtful things, and I spent 20 minutes calming people down”; he’s quite astute and it has helped him know when, who and with whom to be more empathic and supportive.
Let everyone vent about their employer anonymously until there is a breach and all employers get to see who said what.