His climbing numbers were insane in Gran Camino and Basque iirc, and there was some sort of personal issue before Paris-Nice if he is to be believed, competition not on the very top level granted but even so it's night and day between his level and what Froome's was in early 2017.
Chris Froome (born 1985-05-20 in Nairobi) is a professional road racing cyclist from Great Britain, currently riding for Israel - Premier Tech. His best results are 4 wins in GC Tour de France and 2 wins in GC Vuelta a España.
www.procyclingstats.com
What's more concerning like has been said is that Kuss and Soler look better than him, who both rode the tour at a high level before this.