Can we stop using Hidden Power as an argument? Genesect is not a counter to Umbreon, HP Fire always 2HKOes! Heatran walls Houndoom? Shut up, Hidden Power Ground OHKOes 100% of the time!
As Winterdaze pointed out Milotic with HP Electric is now very rare, so Milo is basically setup fodder for any Gyarados, no matter if it has Dragon Dance, is a RestTalk set, or a DD + Taunt set. Don't forget that Toxic is the bane of Milotic's existence, Marvel Scale doesn't help it at all here.
As Winterdaze pointed out Milotic with HP Electric is now very rare, so Milo is basically setup fodder for any Gyarados, no matter if it has Dragon Dance, is a RestTalk set, or a DD + Taunt set. Don't forget that Toxic is the bane of Milotic's existence, Marvel Scale doesn't help it at all here.