4chan doesn't allow criticizing Russia, which if true, is of interest because 4chan is one of those places that trolls have been able to get their racist and fascist memes out in the public view, and into mainstream discourse. 4chan is also been accused of being Russian-influenced. Deleting posts criticizing Russia would seem to be more evidence of that influence.

Reddit doesn't allow criticizing "the west" is not relevant. It's vague in a weird way, and not even equivalent. "The west" isn't well defined: western hemisphere, NATO members, western Europe + USA and Commonwealth nations, what? This is vague enough that I'm sure you could look and find examples of unfairly downvoted reddit posts and comments.

But so what? Reddit is not 4chan. This is classic Russian-style "whataboutism" (https://en.wikipedia.org/wiki/Whataboutism). Like I wrote above, that's of interest because if some 4chan moderator is deleting Russia-related comments/whatever, then someone using a Russian-style attack on criticism of that would seem to be part of the 4chan problem.