I can perfectly relate to FMC.
As a student, I excelled at anything related to science and engineering (now I work as a programmer).
At the same time, I hated arts and literature.
How the hell am I supposed to deduce, what did the author mean? There is never a clear and provable answer, only an interpretation of someone else, making or grading the question.
For arts, the answer is your method to which there are multiple.
Unless your teacher is an arse whereas you are inculpable.
For lit, the answer is your thinking to which must be critical.
Unless your teacher is opinionated whereas you were right to be cynical.
Did you take an innovation challenge out of interest?
I reckon that's the closest to non definitive answer testing you'll get in engineering nowadays.
Interestingly early engineering (namely structural engineering) was closer to philosophy and a lot of the mathematical/logical framework we rely upon today only really started being developed in the mid to late 18th century.
For the last century, education has been very one size fits all.
There are many ways to learn a topic, to which the above history conveys.
I wouldn't write yourself off.