"Might I say immediately, ... that we always have had (secret, secret, close.the doors!) we always have had a great deal of difficulty in understanding the world view that quantum mechanics represents. At least I do, because I'm an old enough man that I haven't got to the point that this stuff is obvious to me. Okay, I still get nervous with it. And therefore, some of the younger students ... you know how it always is, every new idea, it takes a generation or two until it becomes obvious that there's no real problem. It has not yet become obvious to me that there's no real problem. I cannot define the real problem, therefore I suspect there's no real problem, but I'm not sure there's no real problem. So that's why I like to investigate things." - Richard Feynman
Feynman actually came along after quantum mechanics was very much developed, yet even he admitted to having a problem developing an intuitive feel for it.
I have never spoken to or read anything by someone who claims they intuitively understand quantum mechanics.
I suspect it isn’t something that fits well with the way the human brain works.