It 100% looks like they were planning to force a confrontation. Notice how all the escalation is them, they start escalating over basically nothing, and they keep trying to crank up the temperature while Zelenskyy's keeping things nice and even. This didn't happen the last couple times world leaders made far more confrontational statements in a similar setting, but also Vance wasn't there to provide emotional support those times and, well, there are some common sayings about the actual nature of a bully.
I think Zelenskyy didn't give them the sound-bites or vibe they were looking for, but they're claiming some kind of victory (WTF) on social media anyway. Meanwhile all they managed to do was look some combination of stupid, childish, and traitorous, while he came out looking incredibly restrained, and overall more-articulate than them despite the handicap of speaking in English rather than his native tongue.