Molinism is a sincere effort to affirm both the sovereignty of God and free will. I won't bore you with the details, but the Latin Rite folks were facing a revolt among theologians called the Jansenists who followed Augustinian teachings on predestination (which was the fountain from which both Luther and Calvin drank). Jansenism was defended by no less a mind than Blaise Pascal, but it was to no effect. Jansenism was purged from the Latin Rite, leaving something very like Molinism or Arminianism (from a totally different intellectual process) as an accepted orthodoxy.
But I would not want you to think that Arminianism is consistent with the Latin Rite conception of salvation. Arminius would be horrified at the concept that salvation is grace plus works.
Anyway ... Molinism, intellectually and despite purposes to which it has been used, contradicts the concept of libertarian free will. There is, in fact, no such thing as libertarian free will among humans. We are all the sum total of our life experiences and choices. To think that humans have completely free will is to ignore reality.
If I'm 5 foot 3, I may have free will to become an NBA power forward. But it's not going to happen.
I might want to be doctor. But if I grow up in a house that denigrates education, my will may not be realized.
If I grow up in a home in which Dad uses Mom as a punching bag, that fact affects my entire life. Do you think someone in that situation has completely free will? No, it is colored by experience.
I might want to become a model ... well, you get the point.
Molinism, then, is a sincere attempt to put God in a box of our own making. God is required to consider the infinite algorithms of free will, which are in turn colored by thousands of decisions along the way so as to make free will essentially a myth, to determine what he will do.
I don't think so. But I may be wrong.