I have a fairly senior position in the public sector.
There are some performance management issues with one of the staff members who isn't my line report but I was asked to pick it up because the big boss wanted to be able to distance himself, for perfectly legitimate reasons relating to something else going on in the organisation. We discussed what needed doing, in line with the policy and he asked me if I'd mind being the bad guy on this occasion.
I was happy to step up and take that responsibility.
I had the meeting and did it exactly as we discussed. Staff member has sent big boss a long email of complaint, with some quite personal criticisms of me, which were actually me doing what the boss asked me to do and also in line with policy.
I'm not upset that he's complained, that goes with the territory, but I am outraged that boss has decided that in hindsight it could have been handled differently and he isn't going to back me. IMO, this leaves me with no credibility to deal with other staff who are my line reports.
I don't expect never to be criticised and consider that I'm actually pretty good at taking constructive criticism but in this case, I did exactly as I was asked/instructed and the plan of action was agreed in advance.
Now boss is going to tell difficult and gossipy staff member that I got it all wrong and he would have handled it differently. I also happen to believe that the original action was correct and would be happy to justify my actions even if I had acted without consulting boss and I'd still expect to be backed. Boss is now going for a much softer line which bears no resemblance to the policy.
I'm not often upset by things at work, have a fairly thick skin and am able to let things go but this has really got under my skin.