I wonder if a big part of the reason is just the whole phone call about Biden and subsequent impeachment, and how Zelenskyy wouldn’t play ball and the whole thing damaged Trump’s ego in a big way. So even if it’s politically advantageous in every way to say you want Ukraine to win, Trump is incapable of doing so.
https://theonion.com/fuck-everything-were-doing-five-blades-1819584036/