Valve why I no can play

[Nyrator]

Seriously I finally start getting into TF2 again and right when that big summer update of balance hits my game crashes on start up or when joining a server off of someone else every single time.

It's been weeks Valve I missed the summer crates entirely why won't you let me play

[Haunwulf]

Verify game files? That's all I can really think of, other than that I got nothin'