Getting jaded is a good excuse for taking a step back and reevaluating your life choices, and maybe finding another hobby. It's not a good excuse for going out of your way to hurt the feelings of people who aren't measuring up to your standards.
“maybe finding another hobby”
It’s very easy to sit here in our armchairs and go “yeah he should just abandon his project”. I’m not sure how any of us would react to one of our projects growing to the scale linux has, but blithely suggesting one should just swap careers or hobbies (since programming is -just- a hobby apparently) is not productive at all.
> But if someone who 100% knew better did something they shouldn’t have, sometimes getting chewed out is appropriate.
I don't think this is unqualifiedly the case, and I very much don't think this is the case in a situation where a hapless stranger's transgressions only go as far as wasting five minutes of your time by making an unacceptable pull request.
It's selfish to assume that because you might be happy doing that, then all people should do that. Maybe he wants to work on Linux? Nobody is forced to contribute to or work on his project.