TOPIC: Help!

Why is it been like this with the erver lately, for the past week or so I cannot see materials, text screens have squares in them, some doors aren't visible on server 2, I can see peoples names through walls (in some places on both servers)
How do I fix this?

Ive got this aswell...

This could be something like the last gmod update where you got lots of errors if you had downloaded the materials for other games without having the games (tf2, hl2, css content etc..), I fixed it by deleting any content I didn't own that I downloaded from a site. This could still cause errors as you wouldn't have the content if you delete it.
So try deleting any unverified downloaded game content to see if it fixed it. (Deleting my tf2 and hl2 downloaded content worked for me, however you could still get errors if you don't own css).