Failing that, as this is understandably an inconvenience, I’m happy to contact Steam and request that they process a refund for you should you rather take that option.
This is unrelated to the OP’s issue and is actually a result of the latest update to the ‘Bot Improvements - Combat’ mod. Please see here for more information: June 2021 - Known Issues List – Fatshark
I tweaked my graphical options a bit. For years I had ran a custom low settings mix, which recently started giving me FPS drops. Upon resetting config to high settings I started getting far better frames, but also these crashes. I switched off few options, especially the physics. So far no crashes.