I think the reason why people are arguing with you including myself is the simplistic attitude you display to our status compared to Madrid. To be fair, that's not just you as it is an attitude shared by many United fans. You use the fact that they signed players we were linked with as evidence to them being bigger than us but if that is the case, do you also think Chelsea are bigger since they reportedly beat us to Robben, Mikel, Essien, Duff?
You bring up examples of selling players to them and yet if it was the reverse, in the case of all these players (except Ronaldo), the narrative would be "United take Madrid's rejects" instead of "Madrid take players off of United". As has been pointed out to you, all of these players were not wanted anymore either by United or Fergie, Madrid offered them a prestigious way out not too dissimilar to us getting Di Maria from them last year yet no one is pretending that we took a player off of them.
Finally your point about them beating us to signings is factually correct but highly misleading. They adopted as a strategy the pursuing of high profile players to augment their status financially and extend their global reach. Perez valued this even more than winning trophies and it did came at the expense of success. We, especially under Fergie, never adopted such strategy. It was always team first and it sometimes went even too far as was the case in the Hazard saga for example. So of course we lost players to them as we did to Chelsea but you cannot simplify it as a straight case of being fancied less. There is only one significant transfer that they came out on top with and that was Ronaldo's but you can say the same if not more about Figo's from Barcelona and yet no one is talking about Barcelona being continually humped by Madrid.
The point is of course Madrid are a glamorous club, in fact, for the Iberian and South American players, they are more glamorous than us and nobody can argue against that but so are Barcelona, the Milan clubs and maybe even PSG now since this has more to do with cultural factors than sporting ones. Since Perez, they actively worked on building this image of "the" most fancied club in the planet and they did succeed thanks to his aggressive "stars" at all cost strategy but it came at a price. Just because we and other big clubs did not pursue the same strategy, does not make us of lesser status.