"Unless 10 people each game are willing to watch 10 people play games for atleast 100 games the stat of blue beating purple due to camera angle just can't be done."
No, this is not necessarily correct. Given enough games, with a wide enough selection of players and teams, we would expect the win ratio of blue vs purple to be equal. If it is not, after enough games, then we know something is skewing the results. The most obvious question to ask in such a scenario is what factor is equally present in all of these 10 bojillion games that would skew the results towards a blue win? One possible answer to that is the camera angle, which is fixed for all games. On the other hand, assuming that the purple team is just generally composed of worse players, has a higher percentage of leavers, or some similar factor, is not as good of a reason for a skew in the win ratio.
I'd be very interested to see the win ratio on SR broken down by elo and time in game. I'd bet that blue does have a higher win for lower elos and people who are newer to the game and genre.