or at least, nowadays, I'm feeling kind of low self-esteem about my vocabulary. (or how to explain it)
No one has told me this personally, but I'm just feeling that way.
I have been told though once, when I was 13 or something, that I have troubles communicating with other people. Or that was before I got diagnosed with autism.
That might not have anything to do with vocabulary.
I do also feel like I often have troubles expressing myself using words, even though, on this forum, I'm kind of known for writing fanfics.
I speak 3 languages fluently, so in some languages my vocabulary might be better than in other languages.
English is my third language.