“Let’s see how long he lasts" implies that he won't last long.
If you can't understand this, then you need to improve your reading comprehension.
I think you can understand it, you just don't want to admit he's wrong so you're moving goalposts like I said from the very beginning.
Neither are you as you’ve made abundantly clear.
Correct, I thought Ukraine actually had a chance of winning at first.
If you have a problem with what I said, just say it directly.