Fair share of bad luck? lol... Baku and Austria were Hamilton's to lose. Hamilton's engineer's job is to make sure he has a reliable setup for the race weekend but ended up messing him up in Russia and Monaco with the rear consistently losing grip mid corner.At the end of the 2007 season Alonso and Hamilton were equal on points. If that means that he whipped Alonso, then we have a different understanding of what that actually means. Hamilton ended up in second position because he had one second place more - so they were both equal on the number of wins aswell.
Despite Hamilton having big talent without any question, I consider Bottas to be on the same level this year and I don't see a reason why he should act as a support driver. And not just because Hamilton got an unreliable car, but for the fact that Bottas has beaten Hamilton on track for the victory two times so far with Hamilton simply being unable to setup his car and to find the speed. If you consider the colissions with Kimi, you know where both Fins lost their ground in the current fight for the title, so at the end Hamilton and Bottas had their fair share of bad luck. Hamilton might be the quicker driver when you look at the sheer speed, but we all know that this isn't everything.
If Mercedes don't win the driver's championship, they only have themselves to blame.