Welcome to the forums josigod, glad to have you on board.
I live in Canada, so I am familiar with the Babe curse. It's kind of funny, because Boston traded Babe Ruth to the Yankees for cash, and then he went on to be one of the best players ever, they regretted it for years. But they broke it last year in style, coming back from 3-0 to win 4-3, that takes gutts!
About Inter, I too believed in that, but you know what, it's not true. Think about it, what are the reasons we think of a curse? Incredible losses, High-Profile players failings, Selling excellent players before giving them the chance etc...
What I realized is that these problems happen with all the teams, difference is that they are noticed when there is success. Our lack of success is due in part to the corruption of Serie A. We are the only team amongst the big three who don't have real powers other than our money.
Juve's cheatings are legendary, and Milan have a very strong influence with their GM (President of Lega Calcio!!!!) and Owner (PM of Italy.) Those two scums get ridiculous favours. Think about it, they struggle in games, and then get a favourable call either in a PK, a disallowed goal for opposition, ridiculous extra time or lack of it etc...
When is the last time we won thanks to a favour? NEVER, at least not in the last 6 years I've followed this club regularly. If anything, we got screwed big times thanks to some dubious decisions.
So that's pretty much it. Few remember that Rivaldo was a huge star and at the peak of his career when he joined AC and failed miserabley, they also ended Bierhoff's and Javi Moreno's careers. Two players that were on the rise when joining Milan. Not to mention rejects who achieved great results elsewhere, such as Ayala (best defender in the world in the last 5 years), Davids, Vieira (one of the best CM's ever), Kluivert.
However, everybody talks day and night about Pirlo (really overrated, and really one-dimensional) Seedorf (raw player, good physique and zero technique), Mutu and Ferrari (two blunders, but great blunders in hindsight) etc...
So, it's not a curse as much as it's lack of power. Trust me, if we won something, nobody would ever talk about those things. Just like they don't with Milan and Juve.