Carmack did his thing 40 years ago; before social media was as prevalent. I'm sure if the community was as large and talkative then as they were today; you'd find many detractors.
What about Palmer Luckey ? I don't think he received a lot of criticism before he founded Anduril Industries.
I don't have a strong opine on him; quick wikipedia skim tells me certain crowds probably hate him as a military contractor. Some people hate anyone/thing associated with that space.
True. And does anyone talk bad about the two Google founders? They are pretty much invisible multi-billionaires now. That is a major accomplishment!