Can a toxic person change for the better?

Me (F29) him (M26) in a 2 year marriage. Hi everyone, first time posting. I'm the toxic person in my relationship, I've created so many fights for stupid reasons, now that my relationship is on the rocks I want to change, I'm in the process of meeting with a therapist. I want to change really bad!! I look back at myself and see what a horrible and disgusting person I've been and I regret it! My conscience has been killing me lately. I am ready for positive change! I want to know if any of you out there who were the toxic ones, did you change for the better?? Did your partner gave you another chance? If so what was the outcome? Any tips on how to be a better person? Thank you so much!

tldr: I want to change my toxic ways and I want the know if there is any hope.