Hi, I am in a somewhat similar situation. I recently returned to building models following a long hiatus.
When I started back, I bought a couple of older Revell/Monogram kits (P-47, Dauntless) simply because that's what I was familiar with. I ran into the same problems that you describe.
I then purchased a couple of Tamiya kits after being told they were very good, and it was like a revelation. The pieces fit very, very well. They almost clicked into place, like Legos. The detail is far more intricate, and yet they don't come with a million tiny pieces. They are fairly simple to construct, but look like scale models rather than toys.
I would highly recommend that you try couple of Tamiya kits.
That said, I have discovered that there is a big difference between older Tamiya kits and newer Tamiya kits.
A few Tamiya kits that I found to be very user friendly are the P-51 (several different models), Bf-109, Wildcat and Spitfire. You will be amazed at how well they fit compared to older designs.
Older, cheaper Tamiya kits such as the Rafe, Zero "Hamp" and Brewster Buffalo are good, but not as good.