I hope you don’t mind me weighing in as a former Catholic. When I was trying to revert, I dove into the Faith and understood it in a way that was very different from how I had been taught it as a child and what I found to be the biggest stumbling block was the submission of the will to human teachings required of Catholicism in a way that I don’t think is present in any other Christian Churches.
Now, let me explain that statement. By human teachings I mean the development of the magisterium over the last several millennia. Now, of course, for a Catholic, these are not human teachings as the Church is infallibly guided by the Holy Spirit. But if you don’t already believe that, it sure looks like it was a lot of theologians, philosophers, and bishops thinking about things and coming up with their own answers to questions which are now binding on all Catholics.
They may have tried hard and often did as good as a job as possible given their knowledge and culture at the time, but if you grow up in the modern world, you are likely to have an idea of “progress” that strongly suggests someone in the 12th century is at a disadvantage relative to a modern person in thinking about most things. If they weren’t, what good is all the sociology, and psychology, and philosophy that we’ve been doing all this time?
An Orthodox has to submit to a more limited set of infallible teachings coming from the early councils. A Protestant maybe has to submit to the ancient creeds and maybe not even those. But a Catholic must submit their will and intellect to huge body of doctrines that are still being developed. And you may ask yourself is this the same as submitting yourself to the will of God?
For a Catholic, yes, it absolutely is. And if your view of “freedom” is that true freedom is the freedom to accept the Truth of the Church, then this required submission is freedom. But if you view freedom as the ability to question widely, even if humbly, it’s hard to argue that becoming Catholic doesn’t involve a large sacrifice of intellectual freedom.
I also want to add that I think intellectual humility is extremely important and one of the most sublime virtues one can posses. But intellectual humility is not the same as submission.