Actually the mistake was Jumbo not having figured out who's their strongest climber.
Because it was always clear that either Benoot or Valter has to kick it right from the bottom of the final ascend to drop all other riders and win.
Costa always was the strongest sprinter in the group, but had already shown he can't keep up once someone jumps on all other ascends in the final.
So it ended up with Madouas being the hot favorite. As the Frenchman actually is a good climber (at least not much worse than Benoot) and owns a good sprint as we saw at Luxembourg & the Tour de France last year.
But Madouas doing the majority of the work would always result in either Benoot / Valter jumping from his wheel on the finish hill or Costa winning the sprint. Especially since Madouas already had invested quite some energy after his crash / mechanical. So of course he rather lost it against Pidcock who fully deserved his win than being fooled by Benoot or Costa. That's weirdly enough how cycling even with all competitiveness of a professional athlete is being set up.
So the whole situation only occurred because Jumbo never determined one clear lieutenant to chase Pidcock, with than would've been joined by Madouas.
I disagree with Mohoric though. If they sacrifice Valter. That's serving Madouas victory on the silver platter. There was no way Benoot would be able to go long out enough on that short ascend to gap Madouas. And Tiesj doesn't have the sprint to beat him either as the result sheet shows.
Jumbo should've sacrificed Benoot. Telling him Felipe Massa style "Atilla is faster than you. Can you confirm you got that message?" Because even if the Hungarian wasn't able to shut the gap to Pidcock earlier on, he initially looked stronger in the final. Closing gaps time-delayed with quite some ease. BUT if Jumbo does that and then Valter can't gap Madouas either and thus loses the sprint there's even more drama than there's probably now. Because if you relegate your initial leader and it doesn't work out dispute's guaranteed.
Hence why everything actually developed as it had to. Because Jumbo didn't want to take a wrong decision. Which only resulted in them taking no decision at all which is wrong 99% of all times. Only German finance minister Lindner truly believes not doing anything is better than doing something wrong.
Madouas won the sprint. Finishing 2nd by being the strongest from his group, rather than being fooled by someone he brought back beating him. His decision payed off eventually.