The only reason Vettel lost in 2014 was the same as Hamilton losing in 2011 - calamity year where he was one of the worst drivers in the field, as shown when he was overtaken by a Caterham. RIC's record against JEV (only outscoring him by one point with JEV having considerably worse luck, being screwed out of huge points hauls more than once) is much more representative of his actual skill, and the exceptional RBs are masking his inherent lack of pace relative to the rest of the field.
And before you say that good drivers never have such years, I need only remind you that Alonso lost 46-33 to Trulli in 2004 before Jarno lost all the upgrades, and 46-45 before Jarno was fired.
As for Bottas, I'd rather wait until next season before making that sort of judgment. He was easily on par with Hamilton in the first half, making up for his lesser pace with far greater consistency as well as unexpected results (nearly getting pole at Monaco, winning in Russia), and his recent car troubles highlight just one of the many reasons I don't trust the Brackley team to be honest about anything they do.