two bad calls don't make a right?
Not at all.
Not justifying Ramos' handball at all, I am explaining what happens on the field.
To end this bullshit right here I would say that this year Madrid have been luckier than most. We have been at the receiving end of many dodgy calls throughout the campaign. Our lead my be flattering, or, perhaps, Barcelona's lag is unflattering. 10 points is a lot, especially at this stage of the season. But most years, the completely deserved winner always has a flattering lead for one reason or another, and it has always been evident that the number 1 spot in the country has its perks. Barcelona benefited as well. This is not a Spanish case, it happens in Serie A and EPL.
That is not to say that there were seasons where the leader was rightfully ahead by a deserved amount of points, because there were seasons like that. Some went down to the wire, like Valencia's win, and Sociedad's near triumph, and none was closer than Madrid's win over Barcelona's on h2h.
But Madrid's extensive point lead is primarily due to their repetitive winning and Barcelona's lack of initiative (or I should say, lack of will to finish of matches). Madrid have a large squad, where key players were injured someone else replaced them just as well enough to continue winning. Barcelona's injuries, rotation, change in tactics and slight over confidence has cost them dearly in the league. Some decisions perhaps might have eased our way to a 10 point lead, might have actually increased it from, say 6-7 to 10 points. That I cannot predict considering how the team's reactions are in different scenarios.
Now how much help has Madrid received this year in comparison to winners from previous year? That is up to everyone and their bias. It is futile to go into this stupid discussion, oh your team benefited more than we did, oh no, my team benefited less when they win than yours...of course there is also the stupid claim that Barcelona win titles with the referees against them every year which I will not get into