MCU Villains: Why so controversial when criticised?

Because of the era he originated in. Put him out today and he wouldn't be seen as all that revolutionary.[/quote]

Again a weak and irrelevant argument that doesn't really even make much sense because if these characters hadn't existed in the first place then who could even say what the standard of villains would be like in today's era.

At the very least, Darth Vader was considered a fantastic villain for his own era. Only Loki can really compare to that in this era.