In terms of advantage look at Grealish and Phillips. Could any other team buy these players for that money, have one never play, one now sit on the bench and still keep spending ridiculous amounts. Failures in the transfer market just don't impact them.
I don't think any team had a chance at signing Halaand with the finances involved. That's a pretty big advantage and absolutely helped them finally win the champions league.
Everything he's done there is tainted. I don't see how you can say yeah there was cheating but he still did a good job. I'll be honest, that's kind of Trump esque cult like behaviour