I've followed cycling for 30+ years and Thomas is the most ridiculous "champion" I've seen. In his debut tour he was penultimate! (That's second to last for the illiterates.) The typical progression of a guy with the talent to win big tours is someone like Contador - 30th in his first try, 9th in his last, and in the top 5 in all other big tours. Fignon, Hinault, Lemond, Ulrich - all similar profiles - one or two tours out of the top ten - the rest in the top five. Hinault basically only finished 1st or 2nd.
Thomas, on the other hand, never finished in the top 30 in any big tour until 2015. Then he jumped to 15th twice. And then suddenly he won. A guy like Hinault or Ullrich never did as badly as 15th in his whole career.
Do you understand that in bike racing, the support guys are not supposed to finish high in the standings? they are suppose to ride a x watts for x number of minutes to make the race as hard as possible to the field is thinned out. They are supposed to ride so hard that they can barely pedal the bike.
Thomas was finally given the chance to ride for himself after years of working for others. It's not at all ridiculous that he won.