I had this same thing happen to me fairly recently in my life. Was a middle-manager and everything. I went through the same set of fears you seem to be, like, whether I’m working at the patience and understanding of those around me or if I’m actually doing a good job. I actually wound up quitting from stress, though retrospectively I was never disciplined by my supervisor and lived with the perception that I was inadequate and that everyone hated me in that role. After leaving I came to see that wasn’t true and many were surprised I was leaving, which surprised me. That said, I made the kind of mistakes and inefficiencies anyone with ADHD might.. if I could give my past self any advice it would be to not let that destroy me emotionally and to just keep doing the next right thing.