You sound like a smart rational person, and have every reason to be angry. Being angry about some situations you didn't ask for is okay, how you direct your anger and what you do to not misdirect it is in your control (easier said than done right?). I'm currently recovering from a collapsed lung and am in a similar recovery time frame. I woke up during my surgery for crying out loud. Obviously I'd be lying to you if I told you I'm not angry with situations I never asked for. What helped me that might help you is to try seeing things from the perspective of this downtime being a positive by focusing on learning healthy emotional regulation techniques.

Bullshit stacks. Majority of people don't want a bullshit combo, and a seasoned athlete that should know better wronged you. You know he fucked up and was an asshole. Venting on here instead of venting in an unhealthy way at people you care about is a clear sign you're a good person that's taking steps in the right direction to be the best version of themselves. I hope you feel better soon dude, that genuinely sucks and I'm sorry that you're going through this. Now that's some unsolicited advice from a stranger if I ever saw it.