I think that CL draw is semi rigged, because Uefa wants different (top) teams to win it.
Something like, their ideal scenario would be:
-- Barca wins in one year
-- then Real in the next year
-- then Bayern
-- then one English team
-- then Barca again
-- then Real etc
That way big sponsors like Nike and Adidas would both have their teams and their players winning it, and both big companies would profit.
The same story is about Spain, Germany and England if the winners are interchanging.
Also, Uefa is that way creating some kind of rivalry between 2-3-4 biggest teams.
Also, I don't think that Uefa would want Barca to win it 5 times in a row.
But also, I don't think that they would want for Real to win it 5 times in a row.
In a current era, there are some indications that Barca won "enough" of trophies, and Uefa would be happier now with Real winning 1-2 trophies.
But also, there are some indications that Uefa wanted us (Barca) to win some trophies in the past 10 years, the same as they are rooting currently for Real.
(Uefalona stories come here).
In shorter, I don't think that Uefa in general is rooting for Real ALWAYS.
If something like that exists, it is only a current state, since they want for Real to win it, so that Barca and Real can create even bigger rivalry, the same as Messi vs Cr7 (stuff like this sells papers, commercials, people watch games, people talk about it etc).
Imo, if one team is too dominant in a CL for 5 years in a row, Uefa will earn much less money from sponsors, commercials and tv sales.
This also explains why Uefa tried to create Barca:Real final for a few seasons in a row.
It would get the highest amount of viewers, tv sales, commercials, sponsors.
I usually hate majority of conspiracy theories, but since a lot of money is involved here, I do believe that the CL draw and referees are rigged and biased to some extent.
Again, NOT for Real, but for a "bigger picture"-plan where Uefa wants top teams to interchange on top every year.
(The same as how World cup hosts always get some help from the referees in a grup stage and until a quarterfinals).
A lot of money is involved and they are slightly "helping" to some teams to get more viewers and more people interested in games/tournaments.