For Ronaldo returning back to Manchester United to play for the second time shows he loves the club very much. Manchester United are not good with their players both on the pitch and outside, each time their player leaves the club being signed out or on loan they become the headline of the new club while returning back from loan things goes for the worse. It's a problem with Manchester United, not just financially but things might be wrong somewhere that isn't said publicly. CR7 is not who they needed to revive the club, what they need is new experienced signings and a good lineup.
You're right about that. Personally, I've seen that many players who leave MU have no desire to return However CR7 tried to change the story and was treated practically like garbage, where they showed him no empathy for the serious moments his family was going through, This speaks very poorly of the club on a humanitarian level.
You don't have to blame anyone for that but Ten Hag. He was the one who treated Ronaldo like garbage and made everyone to believe that Ronaldo is a set back to the team. Look at where Ronaldo is currently, he has made SPL famous and receives a fat pay. I wasn't really happy that United treated Ronaldo that way but you cannot stop him from shinning wherever he goes.