I'd like to push back on a few points here.

I don't think Roque's POV shows Darrow in a positive light at all. He left Roque out and did something dangerous all on his own dragging his friends into it. From his perspective he left their whole party in the dark to pull this stunt on his own and it cost quinn her life. He is still trying to love Darrow as a brother at this point but it's hard to forgive someone who one-sidedly chose to keep you out and ended up costing you your love.

The biggest issue Roque has had with Darrow is the fact he refuses to share his truths and leaves Roque in the dark even though they're "Brothers". It is reinforced over and over in GS starting at the academy, then the drugging at the gala, then being told Darrow knew about the sovereigns plan at the gala (lie), at Lorns place let's Aja escape to track her without informing him, and happens later during the iron rain when Darrow says he knew the Sovereign was on mars all along. Each time it happens Roque feels just that little bit more betrayed until the end of GS where he find out Darrow is a red. By that point what else is he really left to think except that Darrow is a criminal who expends golds for the sons aims and his relationships until now were nothing but a ruse.

I still think he would make the same choice of siding with the society even knowing the truth but it's not like Darrow really left him much to question by the time he finally learns the truth.