Why first question is why will Manchester United even want to spend a huge amount of money on a player like Ronaldo? The amount that Manchester United will be using to sign Ronaldo, it’s better they spend it on some young quality players. With Ronaldo current age, then he can’t offer Manchester United anything, Manchester United are just going be wasting money on him.
They have had many things wrong at their club and not only at coach postisions or players so they have failed even hiring and firing many head coaches, buying and selling many players with expensive bought prices from other clubs. They only can find success again if they have proper strategic changes in their club and perhaps they want to try it with Erik Ten Hag but failed with him, then they have been trying it again with Ruben Amorim. It's their strategic change at head coach position, that's good but not enough.
They also must have strategic changes in their player transfer strategy by avoiding overspending for star players with too expensive costs and focusing more on young players to save transfer costs as well as have more sustainable growth from home-grown players. Or at least they can order their scouts to find around for potential youth players, bring them to Old Trafford at cheap costs and grow them up.
I don't believe that Chelsea fans were hoping to win the title this past season because they lack the quality to achieve it. Chelsea won the Conference Cup competition which I feel is what they deserve and nothing more. If Chelsea feels that they gat the squad to win the EPL title, let them prove it to us next season.
There are other strong clubs who hasn't faced any challenges for a while now, those clubs are the ones that are capable of winning the title because the players have been playing together for quite some years now.
Chelsea have been improving well in two latest seasons and a next season can be time for them to participate in Premier League title race with other clubs. They are on a right track of building up their team and returning to Premier League title race as well as appearing in UEFA Champions League again. Remember that Chelsea are one of very few clubs in Premier League that can easily spend money to buy players if they want so they are able to improve their squad quality easily.