Just an anecdote, during one of my exit interviews, I ranted about the problems, including the ineffective leadership of my boss and my boss' boss. 9 months la

Just an anecdote, during one of my exit interviews, I ranted about the problems, including the ineffective leadership of my boss and my boss' boss. 9 months later, my old boss actually contacted me and asked if I could go back to work in the old company. Being honest and giving constructive criticism don't burn bridge if the recipients can handle it. If they can't handle it, you don't want to work with them anyway so no big deal for those burnt bridges.