Years ago, a friend of mine asked me to help one of his customers (we worked for the same company but he had clients in the building I worked in).
I didn’t have much going on so told him I would. Her computer kept dropping off the network, so I got to the point where I connected her computer in another cube & had to take it apart & start swapping out components trying to find the issue.
She came over & saw her computer in pieces and said something to the effect as wishing they had sent someone over who knew what they were doing. I looked at her and told her she was 100% right and got up & left. Called my co-worker and told him her computer was in pieces in a cube.
Ain’t it great when someone that has absolutely no idea what your doing ignorantly criticizes your work?
I had similar experiences helping folks in my dept with IT crap. When it happened to me I did what you did......walked off.....and it was a cold day before they got my assistance again.