(besides the fact that it's the Sherwood Cycle Swan Song and even though there's still one more script to write the series as a whole is basically over😭😭😭)
Oliver is a Passive Hero.
What is a Passive Hero, you ask?
Rocky in "Rocky Balboa".
Or the title character in "Ivanhoe" (he spends half the book and a good deal of the film adaptions suffering blood loss and basically in hiding and immobile).
Even--according to some--Katniss Everdeen(as witnessed by this writing forums thread)
And Cameron in most of "Ferris Bueller's Day Off".
There is still a character arc, and the character does change; but it's a slow change, and it comes through an almost deus ex machina type of event or events.
Aka, the story is heavily plot-driven.
Basically, a passive hero is someone who is a pawn of fate. They get dragged through the story because fate demands it; their actions are reactions to an outside force. They complete their "arc" because the plot says they do.
Which still makes a good character (see examples above) it just means that I as a writer need to work harder to make Oliver appealing.
Not impossible, just challenging.
So that'll be cool.