One my good friend's and his wife usually do a cookout and have a little party for every season of Stranger Things. He asked if I would be going this year and I said no. He actually has gotten tired of the show but his wife still wants to watch. I thought the second season was worse but still didn't annoy me until the third season. I have reached a point of being so tired of the "girls who are much better than men" trope that is in everything and to top it off, they have the "insert unnecessary lgbt character"
I remember reading that she was supposed to be added as a romantic subplot for the reformed jock (makes sense for a show paying homage to the 80s) but then they decided to subvert expectations. So I would imagine the next season the four original boys will be background characters so the girls can shine. Also, that little sister was annoying, but of course the critics raved and said that lesbian character was the best one.
They need to get rid of the concept of series, PERIOD. If you have a long story to tell, just pitch how many episodes you want to do it in, and none of this cancelling in mid-story bullshit. I'm getting seriously sick of that.
Unfortunately money talks, so even in countries were series aren't common, like Japan, a super-popular story will get the producers insisting on a season two or at least a special. Even when it doesn't make sense in context of the story. At least it's rare. That's still better than what we get here where multiple seasons are expected.