Have you been disappointed by someone by their actions?

No, never. I’d get a bit of sad upon realising s/he has done something I don’t like, but I move on quickly.

I wouldn’t advise letting your private issues into professional enviornment. Keep private and business separate.

Millions of times. Gosh, where do I start. I may have to come back to this later. Heading out right now.

Basically, it depends on the person who has done the disappointing deed, how important they are to me, how bad the deed was, and the context. My reactions are quite different for different offenses by different people.

Gosh, yes.

My best friend from school days, whom I thought I knew pretty well, knocked me flat last year when he told me he was probably voting for Trump. We’re still friends, but I think of him a bit differently now.

P.S. I don’t know if he actually did it, but just the possibility upsets me.

Sure, who hasn’t, but I wouldn’t say “disappointed” more just seeing a side of them that I choose to not deal with, so I either keep a good amount of distance, mentally relegate them to a lesser status in my mind, or drop them altogether.
Life is too short to put up with asshats.

In a volunteer position I was in a while ago, another volunteer went out of their way to be condescending, manipulative, and stomped all over my boundaries, all in the same five minutes. I told the director, and the issue was “resolved”.

That particular person has problems that go way beyond what a simple reprimand with a director could resolve. What a train wreck! I have never felt comfortable-or safe- around them again.

@snowberry Yes, emotionally unpredictable, manipulative and passive aggressive types get moved to the top of my hit list in record time. haha

Well, sure.
I have had good professional relationships with people I respected, and considered them good and moral.
Then I went out for beers with them after work, and watched them start to cheat on their wives.
I have watched close friends fall short as well.
I don’t judge them, but I am disappointed. I admire many aspects of them, and it hurts to see they are not who I thought they were.

Have I? Ha! Let me tell you about my family.

In a professional environment? I would clearly and concisely state the facts of my displeasure and request it not occur again.