Many Russians already use matrix, they may not use it seriously but they use it.
I mean in the past few days I’ve seen like 20 Russian trolls, spamming scat porn, racial slurs, racist memes, extremist memes, you name it.
So yeah I would say that matrix is already decently popular among Russians. Maybe not for legitimate use but it’s still definitely popular among them.
Don’t apologize, it’s obvious that this user is a troll and is trying to accuse people of harassing them for calling out their bad behavior and how their arguments are wrong.