Brush tool comes out pixelated since updating to Photoshop CC 2018 - Bugs

I've been using photoshop for years but since I recently updated my Photoshop, I've been having this issue. Regardless of the brush I use, it is very pixelated. It looks bad zoomed out also. My document is set to 1920x1080 300px rgb. Anyone have any clue what's going on here?? I've messed with the smoothing, it doesnt help at all. I am not using the pencil tool.

I am also having super annoying issues with Illustrator since updating Illustrator. Such as not being able to select text (when it is not locked) and weird graphics issues like the following: (shapes showing up and not going away unless i zoom in and out a bunch, and artwork disappearing and then coming back once i zoom in and out. It's not a horrible issue, it's just starting to be a real annoyance and making me want to pull my hair out haha.