Speaking as a russian, I have exactly the same prejudice. Our government has done a lot of completely awful stuff in the last 10-15 years and still has wide popular support, so it's only natural that we are held accountable for it.

Also, any company that has significant presence in Russia is subject to Russian influence. These people have ways to make you do what they want if you or your close ones are inside the borders, so you'd be wise to mistrust any software that comes from here.

JetBrains is a Czech company because the founders lived in Prague at the time (maybe they are still living there, no idea).

Most of the staff is Russian though which sort of makes it a Russian company I guess?