How not to be a setreotipical toxic ex (me 30M). My ex is 28F.

So during our last conversation my ex gace me this Tiktok https://vm.tiktok.com/ZNRgNAc1Y/

Real talk. I feel like I'm this stereotype ... especially looking at the comments ... how does it end for people like me? Like I don't want another mess of a relationship like the one I destroyed. I would love to have another chance with the woman I love, but she is kind of done with me. I am serious about wanting to grow up emotionally. What can I do?

Looking for people that know the stereotype and can give me general opinions of how people like me can improve.

For context: I'm a super late bloomer, like this is the first long term relationship and it started when I was 27. So about 3 years. Didn't take anything seriously for way too long of a time. When I started doing so it was too late and it went unnoticed.

What can I do 1) to make myself a better person and 2) to try and show my emotions while respectiog her boundries?