You say that but... that's actually something that really always bothered me about episode 5 (or 2 of the OT) The Empire Strikes Back... Luke goes to Dagobah to find Yoda and become a Jedi. He receives some training. If you look at the Yoda/Luke scenes alone, you'd think that he must have spent weeks there, a couple of months maybe. But if you look at the Han/Leia/and Gang scenes that take place simultaneously - their escape from the rebel base, their trip into the asteroid field, the escape from the asteroid field and them going to Bespin only to immediately walk into a trap - that feels to me like 2 or 3 days max have passed since they fled from the rebel base...
The moment the Falcon lands in the Cloud City, Luke immediately packs up and prepares to leave since he senses his friends are in danger and thinks they're going to die if he doesn't...
Sure, his training wasn't finished yet but still he was a force wielder now, even strong enough to face Vader in a fight... that just never felt right to me... 'cause like you said the force should be something difficult to learn and control... not something you can master during a weekend course to Dagobah...
I mean sure, we know that Luke is extremely gifted since he's Vaders son and of course, Vader wasn't going in for the kill but still... the whole timeline just doesn't feel right to me... Makes it seem too easy.
Don't get me wrong, I really like the OT. The characters, the lore it established, the music and the sound effects, the actors... it's iconic! But it surely wasn't without its flaws...
But maybe I really am just a retard and I'm just not getting it right...