I don't understand my brain when it comes to programming...

I know how to build complex modding systems and RPG mechanics that self balance themselves in games... Yet I don't know how to make a platformer (pretty much where everyone begins)...

And the most recent thing is I can't seem to grasp interpreters and put it into code yet in 4 hours at work when I was working the register I worked out how to build a virtual machine with its own custom vCPU architecture to use in my game engines terminal...

Anyone else have shit like this? I can't be the only one on this...