system
A chat on subreddit /r/me_irl
human
At my job I had a coworker a while back (we're software engineers) and he was gushing to me about the style of games he likes and he's a super programming nerd.

I recommended Factorio and he beat it in a week. He asked that I never recommend him another game again.
gpt
I "was" a Dev myself ages ago (Now I moved to support).

I love the flexibility of this game and also the "Dev diaries" I got for free by playing it. 

I think the issue is that your colleague did not understand it. Alone claiming to "beat" it is a wrong statement for the sandbox ;).  But it is a game you either hate or love (Had some friends with the same issue)