Placement matches

 I Would like to ask u guys, if u think that placement matches and all the ranked system in Heroes of the Storm is fair. First problem I have is that 10 games are so RNG. U have bad day and u are placed in platinum just becouse u were paired with bad players. Now only becouse that bad 10 games, u have to play like 30 games to climb to position (if u are lucky) to be even on diamond. And another thing, placement matches were played against players on YOUR mmr. So guys with really low mmr can have luck and got placed in diamond and good players can be unlucky and they are put in platinum. (this is real story of me and my friend - diference between our mmrs on hotslogs were like 1000 :D). I see podcast with Khaldor, where he said that if u are good enough u will carry. But I really dont think thats always true. Only like 10-20% games I really see that they are better team and we loose on that. But mostly we loose becouse some dude just dies in 5 minutes 6 times. They are ahead like for 2 levels and its almost gg. 
 Another thing I dont really get is that hidden MMR. Lets say that some dude has like 4000 mmr and he can play like only 2 hours a day. But some random dude with 2000 mmr plays 10 hours a day and he climbs to grand master position 1. The first guy with 4k mmr cant even meet this guy, becouse of their different MMR. So, by the ranked system the first dude is worse player then the other one?
/r/heroesofthestorm Thread