- I agree, he has cracked at times, but AFAIK it's been associated with a crash (2023 Giro, though he didn't actually "crack"), preexisting injury (2022 spring campaign), or when his form has clearly not looked right from the get go (Paris-Nice last year, Dauphine last year, though he won, Tour last year). It could change this month, but at this point in time he's not coming off a crash, he isn't injured, and his form looks solid. As someone else said, last year for whatever reason he didn't find his form until the Vuelta. In the Giro, he was getting dropped by Almeida, Ayuso, etc. on very friendly terrain early in the Tour.
- He's never a sure thing. I give him 75% chance of winning personally because I think only a crash can prevent him from winning, but I think there is a solid chance he crashes and a decent chance that crash is bad.
During the first part of the season, I think he was clearly influenced by the team change, with a lot to fix at Bora. He was acting as a rider, director, coach, and nutritionist, if we're to believe certain statements from the staff, plus a lot of pressure to perform right away.
In any case, I think everything came together to make him look much worse than he actually was. I do believe that in the PN, without the horrible weather he had, he was in shape to fight for the podium and some stages at least.
At the Itzulia, I don't think he was far from his current form, not just because of his TT, I have the feeling, that he was ready to win that race, and then the famous crash happened. At the Dauphiné, he was riding after altitude, but he'd been on the back foot for a while with his knee before the training camp (a bit like in 2022) and was lacking a bit of form, but again, I think without those two crashes he had in the race (one of which hurt his shoulder quite badly), he would have won with much less suffering.
About the Tour, Bora admitted that they messed up in the second training camp and everyone arrived very burned out. Even so, just from what I saw in the time trial and at Le Lioran, it was clear that Roglic was recovering his legs just before his favorite terrain arrived (the collection of mountain finishes + the hilly time trial).
In other words, everything has a more or less logical explanation. The Vuelta wasjust the first time everything went well or normal, that despite the pain in his vertebrae.