That's bollocks. He scored an amazing goal vs. Juve but the rest of his performance wasn't anything to write home about, Bale scored a similar goal in the final and many lesser talented players than those two have scored them - Messi's goal against RM where he dribbled from the halfway line was much better and much rarer (even though you've decided it doesn't exist because Pepe got sent off). Ronaldo has never performed to a level Messi has against those teams
@Zehner mentioned - he's scored more goals in KO games as he's clinical but scoring two headers and a penalty doesn't inspire awe like Messi's technical game does for better or worse - that's why pundits around the world were ready to claim Messi as the best player of all time after CL performances but very few have said it about Ronaldo despite his amazing stats. He just doesn't have the genius that Messi has and never will. You may consider that a romantic view of football and that you're more results based but it's you that's in the minority and tbh I pity you for your unnuanced view on the game as you miss out on what makes this sport magic - you strike me as someone who has never played football.
Also, Ronaldo in the semi final legs last season was just as bad if not worse than Messi vs. Roma, he basically just had a load of wild shots. I actually think the first leg vs. PSG when they lost 4-0 was the worse I've seen Messi ever play and that was on par with Ronaldo's most worse games.