I'm missing quite alot of texture like the fences in some shops water is purple also things out of map is also purple and the skyscrappers plus some walls near the pd
btw i have css and hl2 installed +plus all the workshop contect
Try going into your game's main menu; at the bottom right there will be a game controller icon, you should click this and double check that CSS is mounted/checked.
Also, try the other stock things like verifying your game cache, ensuring that the drive your game is on is not out of storage space, and if all else fails, try subscribing to this independently.