Wow, I don't envy you. Going back to regular working like can be a shock.
Reading the comments I got made me realize people like the guy I mentioned are everywhere. Unfortunately.
The world would be a better place if we could enjoy each other's success together and help each other achieve our goals, instead of competing with each other. But at the end of the day, I don't want to waste my energy on trying to change them, so I'm removing my presence if it gets too far.
I hope you can manage these people without giving them too much of your time and energy.