The US president can still be held accountable though. Russia doesn't habe such checks and balances. The russian president can veto over the court and can dismiss the legislature or the government. It can even annull rulings by the court. The court and government on the other hand, don't have such powers over the president. The US court and government do have powers over the president. They can even dismiss the president.

The USs system is problematic in it's own right, but it's far from Russia-problematic.