Why

Okey i had a situationship with a guy for like 11 months, after i struggled a lot with him alll this months i decided to move on and talk to another guy everything was as good the guy liked me i liked him tooo after meeting for four times idk my ex situationship went to him and told him some things about me (i still don’t know what he said) but he ruined my relation with the new guy and i ended up removing him bcs he called me a liar. So I went and sent a msg to my ex situationship to talk about ittt and he didn’t answer me at allll like I did smthg bad to him and from the first place why he’s trying to ruin everything if we’re no longer tgthr