Riddler was absolutely trying to get vengeance, it's a huge part of the plot. He's trying to get revenge on the city and the people he blames for it hurting him, and he includes Bruce Wayne as a primary target in that, for what his father did, and for the life Bruce Wayne got to have that he himself did not. That motivation is incredibly similar to Thomas Elliot, who would be targeting Bruce Wayne for the "sins of his father". Like I'm not saying comic Riddler and comic Hush are at all similar, but in this adaption there would clearly be some big overlaps. I'm of the opinion they should somewhat lean into this and do it with intent, this Hush would have to be a character inspired by Riddler's actions and what he reveals in a way, don't shy away from it. Give his Hush mask the "No More Lies" writing lol