They're extremely hard to break when you don't make the effort. You used male pronouns straight after I pointed out how offensive that was. That's why I find it very hard to believe that you actually want to change.
When I pointed out how trans people are more likely to commit self harm and suicide you didn't say how terrible that was and that you would try in your own small way to make things better, you become defensive and said you'd not bullied any GBLT people.
Nobody was accusing you of actively going out and persecuting people, but prejudice takes many forms. It's a sliding scale, not all racists are active KKK members, but someone who employs a white person over a more suitable black person is still being racist.
Nobody is perfect, we all do things we regret and could change. If you genuinely want to change, break those old habits, I welcome it, but you need to acknowledge there is a problem in the first place. Minor forms of prejudice, like using the wrong pronouns, have a drip drip effect, and very often it's the little things that push someone over the edge.