Personally, had City signed Ronaldo, they still would've made a big move for Haaland.
City have more power in their armoury in dealing with this situation had it ever occurred for them . They've got arguably the best manager in the game, they've been hugely successful and plus they're utterly ruthless in the market. Ronaldo and Mendes wouldn't have tried this sh*t with them because, even if Ronaldo were to be used sparingly, there would still be clarity on their situation plus, overall, City can offer something Ronaldo fundamentally wants and that is continued CL success, even if he may need to occasionally play second fiddle to Halaand.
City would've had the upper hand in this situation. It wouldn't have bothered them if Ronaldo went elsewhere because Ronaldo and Mendes need City more than City need them.
And that would've kept Ronaldo and Mendes on their toes.
Also, its a sad indictment on United at this current time. Like it or not Ronaldo knows we still may need him. Martial's form in recent times, irrespective of his good pre-season start, is erratic. Rashford is also much the same. That's why you see reports of United willing to give Ronaldo the benefit of the doubt ,even when he and Mendes have been trying to get another big move elsewhere. United , from the outside, are coming across quiet weak but we're in a situation where we may need him, especially if we continue to struggle bringing in other offensive players .
Would be nice to see United show some cojones though and basically isolate Ronaldo but with the wage/contract he's on its very, very unlikely.
Overall, I'd be surprised if Ronaldo finds another club. Think he'll be with us atleast til January.