A pile of medals doesn't give you the right to treat your competitors like that. If anything, as a champion he should be a role model and encouraging the Russian men instead of flinging muck because Kovtun thwomped him to take the title Plu's likely final appearance at Russian nationals.
For all intents and purposes, Kovtun's 2013 Worlds was a crapshoot as a junior skater, and this is the first senior season and worlds which I measure him by. While not as successful as Plu/Hanyu/Chan, he still performed very well.
It wasn't enough to be gifted the placement in Sochi, Plu still has to harass Kovtun with these comments and as a prominent skater and champion, he really needs to have more class. And people saying "he's blunt" "that's just how he is" "it's kinda amusing when he says it", that's hypocritical and enabling when you support his disparaging comments and then criticize Chan and other skaters' bad comments.
The issue is kovtun is only good average. Plushenko won a world medal younger than kovtun. He got 96 pcs and kovtun got 90. You are saying plushenko was overscored but kovtun wasn't? What is your point? Kovtun is amazing? A Russian chan or hanyu? Or he is good average? What is so awful about being called good average?