Please forgive my lack of education now, but... "you can't polish a turd"! (^^,)
Yes, this is the worst scene of the whole trilogy, and frankly I don't know if it's possible to restore it at a good quality level, unless someone uses BD and/or DVD and/or 1997 SE scene, and "cut and paste" pieces to obtain a reconstructed scene... but I have not that kind of patience!