A professional programmer joined an amateur gamedev project… it didn’t go well (reddit.com)

That's not a professional programmer, that's a cowboy coder. As somebody who makes his living by writing code, I would not want this guy on my team/project/anywherenearmycodebase.

Woe is a professional programmer, who in in their day-to-day life with programs so poorly structured that their idea of recreation is to re-factor code.

At least redditors seem to be calling out the "professional" for reckless egotism. I'm pleasantly surprised.