There was no amount of flattery that was going to get Trump to oppose his Russian masters. The best thing Zelenskyy can do is make it clear that Trump is foolish for not backing Ukraine. It wins him points with European leaders who get to choose between backing Zelenskyy or following a fool and it increases the odds of getting a more favorable outlook from the US in 2-4 years as political tides shift (assuming the US continues holding a semblance of fair elections in the next 2-4 years)
There was no amount of flattery that was going to get Trump to oppose his Russian masters. The best thing Zelenskyy can do is make it clear that Trump is foolish for not backing Ukraine. It wins him points with European leaders who get to choose between backing Zelenskyy or following a fool and it increases the odds of getting a more favorable outlook from the US in 2-4 years as political tides shift (assuming the US continues holding a semblance of fair elections in the next 2-4 years)