Potentially the Worst Pokemon Returning with the Teal Mask DLC

Just my opinions on some returning pokemon from the upcoming Teal Mask DLC. I am mostly referring to the VGC format while talking about these pokemon, so some of these will have a much better reception in singles formats. PLEASE tell me if im wrong about any of these and/or how you could make these pokes good. I want to be wrong about mandibuzz and chandelure specifically.