It is not your fault the relationship failed. Some people do have this mentality that it's best to just ignore things, but it really doesn't work that way. They will learn this in time, hopefully, but you did the right thing by wanting to address it. 

There might be situations where you pick your battles and decide not to address a particular thing. If something seems very small, you wonder if it is really bothering you or if you are just already in a bad mood, etc., you can take a day or two to think about it and leave it unaddressed. If you forget about it and realize it was nothing, then fine you move on. If it is still bothering you can talk about it. 

However, in general terms communication is important and needed. A relationship won't be healthy without it. It's okay to have different strategies like some people will need time to calm down first and think through their thoughts, some people who are bad at confronting might feel better writing it down first. But things do need to be discussed and you have a right to be heard. 

This person called you annoying, which is hurtful. Then ghosted you which is an immature way of handling problems, and they aren't able to take accountability for their own actions and responsibility for making things better. Problems don't usually solve themselves and it sounds like this person isn't ready for a relationship and may have some emotional issues to work out. I think you're better off and shouldn't worry. You'll find someone who works well with you and can talk things out and be much happier.