u/Grand-Ad-7911

By introducing the Mind Flayer in season 2, we basically got to the final boss in two levels. After that, there was nowhere to go to, it had to be there in S3 as well, then they realized this won't be enough for much longer, so they came up with Vecna whose existence required a bunch of retconning, making the writing feel pretty clumsy.

I think it would have been better if each season just featured different, seemingly independent creatures from the Upside Down, then they could have featured the Mind Flayer for the final season to connect everything.

It's just a little thought.

What do you think? :)