> You wrote "writing and maintaining simple CRUD apps, and to be honest I hate it. Its mind numbingly boring and I certainly dont want to spend my life doing that".

> This has nothing to do with hitting the ceiling of your capabilities.

He also wrote "I fail to understand, fail to recognize patterns, am too slow to understand simple concepts and never retain anything. Occasionally understand the individual concepts of something but then her completely lost when they're all combined in some applied method."

That follows from the part I quoted. It would be very unusual for someone to be good at a task they know they don't want to do and that they find mind numbingly boring.

No it wouldn't. That's the entire concept of working on an assembly line.

Whether you're good at something is not strongly related to whether you like doing it.

It might not be so strongly related in contexts like assembly lines where the skill involved is either minimal or extremely easy to acquire (e.g. learn how to operate machine or follow a 3-step quality inspection), not to mention the repetition involved which kind of guarantees that anyone will eventually 'get the hang of it'. If my job was one task, I'd get good at after some time even if I hate.

In contrast, being good at jobs that require 'thinking slow' (reference to Daniel Kahneman's book) and creating solutions to new problems every single day usually require motivation or perseverance if you wish. These are more or less measures of interest and if you don't agree, then they are at least strongly related to interest.