Why exactly are you singling out Russel? From what I've seen it was a bit of a cumulative thing, but if anything we can single out Kvyat. The recent overview from JP mentions him too. It seems like everyone back to and including Lando was keeping a relatively consistent gap to the car in front.
https://www.formula1.com/en/latest/arti ... I76K7.html
Part of the problem I have with Masi is that he's putting it all on the drivers. Sure they are culpable to some extent, but the mature and reasoned response would be to always see how he as race director can help avoid situations like this, exercise due diligence. His response was petty and childish. He easily could have said "let's see how we can improve things so that we don't place drivers in a position to take such risks, but keep in mind the drivers ultimately have to participate and so will always share the responsibility for how the events unfold".