>>53853026but in the strictest since, megas weren't really a mechanic. The were just special snowflake super saiyan shill forms that only existed to make Charizard and a few of game freak's favorite children look good while throwing all but 46 pokemon under the bus and effectively saying that they weren't worthy of being aces and only exist to be NPCs in order to make the Mega-evolvable Pokemon look cooler.
No one hated z-moves, no one gave a shit about them
Dynamax's reception was mixed