In its core I absolutely agree with @anderspuck Anders Puck Nielsen's quick assessment of the situation after Trump's disastrous appearance on his own stage.
However, it's wrong to frame the meeting as a humiliation of Zelenskyy because in fact it was a self-humiliation by Trump.
Sure, there have been no winners, but there was a clear loser and this was Trump. Of course, also Putin as a non-present participant is on the losing end.