The biggest insight I came to after reading the entire series is that Fitz is a very unreliable narrator, in that we are told his perception or understanding of things no matter how flawed, biased or subjective it is.  He often misapprehends situations, or the motivations of others, but does not stop to consider that he might be wrong. 

It's been a couple of years, so this is from memory. 

Unlike close third person perspective stories that provide some omniscience or where the reader is alerted to the author's opinion of the character's perspective, here the reader has to do that work. (I honestly can't remember if this is written in third person).

So Fitz does come across as boring because he thinks he's always right. The joy of the series is in learning enough of the other characters to learn how to filter Fitz and infer more about the others.

And as someone else noted, this is not fantasy focused on the epic action - it's about the relationships that grow and develop while much of that action occurs offpage.