What can I do about a senior colleague who is always playing petty mind games, e.g. routinely ignores me, is very slow to respond to messages, work queries etc, sometimes by days!
He is cold and aloof. Makes no effort to educate... so for example, if further clarification on something is needed then it's a sign that I am just incompetent and that task should be taken off me.
Escalating this issue has not worked. He has been directly and indirectly responsible for several team members leaving, and contributed to mental health issues in one colleague that I know of. This has already been through a mediation process, but with little change in the long term.
Like other people working under him, the only option I seem to have is to jump ship. This has gone on for a couple of years now and is draining beyond belief. Persuing this through HR is not an option I am willing to consider.