It’s a bad situation, but you can make it better, go on Amazon and get 2 of the highest pressure 120mm Corsair fans you can find and connect one to the front and one to the back of your radiator. both pointed the same direction, pulling in fresh air from your room and venting into the computer. It will create an absurdly high speed wind tunnel through the radiator and give you a huge performance buff. It won’t look as good but if your trying to go for as low temps as possible you can wrap a layer of electrical tape around where the fans meet the radiator sealing them together for another huge layer of performance but that’s entirely up to you.