This is vague enough that I'm not sure which rider you're referring to.
But if it's Abrahamsen, who seems to be catching the most grief over this, he had little to no chance in a sprint. His best chance for a win is to count on someone stitching things up at 800m to go and then launching with 400 or 500 himself.
It's not an unreasonable bet for him to wait for one of the riders with the most to gain from things going to a sprint (Vermeersch and Hagenes) to close things up.
I also see people saying he was on the front when the group sat up, but Vermeersch stops pedalling several seconds before that.
Vermeersch was most upset at the end because he had the most to gain from others doing the last little bit of work at the end.
As I always come back to: the favorite losing in itself is not a useful goal for most riders, even if it is the most entertaining result for viewers. You have to maximize the probability of a good result for yourself, and that good result isn't always the top step of the podium.
its partially deliberately vague because I blame all of them in that chase group really, but I was specifically highlighting Vermeersch as he specifically said in his post race interview he didnt want to waste his last bit of energy to make the last little gap, implication being he didnt want to lose out on the sprint against the whole group of them
well ok fine, so he saved his energy, and still didnt really beat them much in the sprint either, because Hagenes beat him, so he lost the chance at victory, and he lost first of the runners up too, so he got the worst of both worlds out of that.
and if the point is to maximise the probability of a good result yourself, why even work with a group to chase down the breakaway rider like that if you arent going to gamble that last little bit.
thats my point you have 0% chance of winning or a better result for yourself if you dont take the chance of losing it all.
thats what MvdP did, he took a chance when it was presented to him, knowing full well he could completely end up with nothing, in fact most cycle racing experts would have said he was guaranteed to end up with nothing, and yet there he was the winner, because he took a risk, and wasnt going to be the one going to sleep that night wondering if only Id done this instead.