While I disagree with your claim, my response here really isn't a challenge of your opinion, rather a challenge to your reasoning.As amazing as Otamendi has been this season, Kompany is still the best centre back at the club, an unpopular view on here I think but probably a view shared by Pep hence his selection on Sunday and against Basel. He shouldn’t play on Thursday though because his body can’t cope with more than 1 game a week.
You can't say your opinion is probably shared by Pep and then use the selection of Kompany in 2 games as prove. Especially when Otamendi was equally selected for those same games. That's just really odd reasoning.
Let's just conclude you believe what you believe, and it's probably not that unpopular of an opinion anyway. Most hope Kompany's is the best CB at the club. But performance would conclude decidedly that Otamendi is.