I saw this interesting Youtube video from an anti-Putin Russian liberal which analyzes the Oval Office video leading up to the clip that went viral. He actually ends up blaming Zelensky for repeated violations of diplomatic protocol which lead to the famous clash:
Ultimately my takeaway is that diplomatic protocol can seem stuffy, but it exists for a very good reason. Tiptoeing around everyone's ego might seem excessive, but it's way cheaper than e.g. fighting a needless war.
Hard to blame Zelensky for not knowing protocol when he was a comedian elected as an outsider candidate, of course.