Yeah, people are going to do what they want in any walk of life or hobby, good or bad no matter what we say or think. (Those 3 bicycle related people categories fall in there). Some peoples actions are annoying if you let it get to you. Best to focus on things (and people) you can change as opposed to things you can't. That starts at home ( you?). Be comfortable with why you do what you do, or change. Resentment and bitterness is negative energy. If your wishes/goals are not attainable, adjust them, or give them up.
Why frustrate yourself and be miserable when the bar is too high? Stewing over ( I'm not saying who is or isn't) how others are "spoiling" things for you or the hobby in general is fruitless. Don't add to it by enabling them if possible. I've sold ( mostly at losses) many hobby related items and hope it's gone to a good home, but it's gone, so I move on. If someone profits by it, so what. It bugs me a bit, but not for long. It was my choice to sell. Let it go.
If you are on the Cabe, chances are pretty good you are for some reason. There are many. Letting off steam is one. Laughing and enjoying things with "like minded people" is very important. If a hobby isn't fun, it's time for a change. We are lucky to have a hobby that is fun and as affordable as you can make it. You don't need to own, ride, wrench, or collect bikes to be in this hobby. It's not a contest either. Sure, there will be the good, the bad, and the ugly in any situation. Putting it in perspective is the key. Do I follow these words of advice? I try to. Do I succeed? Sometimes.....Ha!!