Based on what metrics?
In the second leg Madrid had 15 goal attempts vs 4 goal attempts from City. 5 vs 0 on target. Also, I remember City not having a single attempt in the second half, which deserves credit as they needed to attack taking risks to overcome the result. And naturally, the home side had to be conservative because of the away goal rule.
In the first leg, Real Madrid had 11 attempts vs 5 attempts from City.
At times I think some people just try to over exaggerate here to make a point, but I don't think you need it. You have good posts in this forum.