I actually found it pretty cool. I wish we could have seen more of Kali. The problem that made people not like this episode is that it was a bit rushed. I feel like if we had like 3 episodes about it, people would enjoy it
Kali also plays a large role on Eleven’s
development (even if people ignore it). She was the one that teaches Eleven how to turn her anger into power. The only reason why the mind Flayer had to make a ‘physical’ body, was because he couldn’t get inside the real world.