I think I’m actually a hard person to be friends with irl

I thought I was pretty easy going, but over the last few days I’ve realised I’m pretty ‘grudgy’. I think I get easily insulted/hurt by what people say, but I can be quite hurtful/sarcastic to them without really acknowledging how they might be upset.
Over the years, this has caused me to lose a lot of friends/relationships kinda without realising how much damage I was doing (maybe I thought they weren’t upset like I was.)
I wish I was different to how I am.