So I get this when I open up my map in radiant... No idea on how to fix this. This is also making it to where I cannot compile my map.

ok the last time you worked on your map you add something to your map that is causing this. Try going to root/map source find  yourmapname.map file.  (make a back up of this file just in case) Next open that file in notepad and scroll all the way to the bottom. Now when you get to the bottom that will be the stuff u last added to your map. I recommend removing 1 thing at a time starting from the bottom till radiant opens up again. don't forget to save .map file after you remove something, save and then try and open radiant.  A model most likely caused this. A brush / entity usually starts with a // and ends with } or }}  makes sure you don't remove part of something else. here is  example https://gyazo.com/db4af817ef3b55a606de0704db86f1a3
hope this helps.