Zelensky was used to having Burisma blackmail on Hunter Biden.
His trips to the Biden White House were all "Give me 80,000,000,000,000 more and a Porsche and let piss in your mouth or your son dies in prison!"
Remember, Trump's first impeachment was over Zelensky NOT giving Trump dirt on the Bidens, which he probably didn't do SPECIFICALLY because he wanted the next President to be his slave.
For the past 4 years, Zelensky has been the unofficial King of America, which is why he's so shocked and uncomfortable sitting across from a President that isn't his subordinate. What's more, a President that actively hates him because he conspired to get him impeached and Biden elected. He never thought he'd have to deal with Trump again.
Baby Zelensky is finally being told no.
Maybe the next American Presidential Election cycle won't be all about Zelensky!