Thank You @andrastia for reading my post.
I think the same as you, I consider that my boss at that time lacked empathy, but on the one hand, trying to be strong, I did not express my feelings and aspirations and that had repercussions every day in my activities, because the frustration was increasing.
However, today I can appreciate that stage because I have learned to manage my emotions better and to deal with my work aspirations when I feel that it is preventing me from growing.
I think that is the most important part ... you have used the experience to learn and evolve your character as a person for the better. In a difficult situation like that one - that is the best that you can ask of yourself.
Have a lovely day