We’re working on it, apologies for the inconvenience.
Perhaps something on your PC could be interfering with your bindings or input - I recommend a ‘Selective Startup’:
Vermintide 2 is particularly demanding on the CPU like you say, so I can only recommend you address the underlying overheating issue at hand. Lowering the ‘Worker Thread’ count within the launcher’s ‘Settings’ menu may lessen the demand on the CPU.
Your installation is incomplete/corrupted - have you tried the Verify Integrity of Game Files option?: