Rss Feed does not validate

I know there are a lot of posts on Rss feeds already here but I don’t quite understand enough off rss to actually apply it to my problem. When i check my site’s feed (https://www.damnhotmess.com/feed/) on (https://feedvalidator.org/ It tells me that my site doesn’t validate

This is the link to all that is wrong with my feed (https://feedvalidator.org/check.cgi?url=http%3A%2F%2Fwww.damnhotmess.com%2Ffeed%2F)

If anybody has the time to help me out by telling me what exactly it is that i’m doing wrong it would be greatly appreciated.