While Sysco is a monopoly, they apparently don't make anyone angry enough to get rid of them. My guess is that they are pretty even-handed across an entire industry and their customers are knowledgeable enough to not screw up a good thing when they see it.
No I think tech just gets obsessive media coverage these days (both from MSM and from influencers.) I know lots of event companies that hate Sysco, it just doesn't get as many clicks as a tech company does.