I had 1 good termination, and that was with the T I saw right after my long-term & unethical T suddenly moved away & was dx-ed with cancer & just...bleh.
Anyways, I saw a T during that sort of crisis period. Eventually, it became evident that he wasn't going to be what would work best for me -- we'd been working together about 3-4 months & I saw him 2-3 times a week.
The decision for me to go see someone else was mostly mine, but also mutual. We had a really really nice conclusion session, I've touched base with him a couple of times since, but really it was all just concluded in a very ideal way.

Many of my other terminations were benign.
Only 1 was traumatic, and that's the one with the unethical T.