I just rewatched the ENTIRE SHOW in 4 days, and Eleven used to be my 4th favorite character (behind Max, Robin, and Erica) but now, I honestly cannot stand her for a few reasons:
-She was selfish and essentially asked Billy to die for her.
-She's boring. Just her personality isn't memorable because people control her and she lets them.
-She acts more important than others, and this really annoys me due to how overrated she is. So many people get hurt overtime, yet she expects Mike and Max to help her walk, and in other circumstances gets taken care of at a higher rate than the others.
-She values her opinion over others. This is proven in 2.7 when she gets the gun out of Kali's hand and didn't agree not to later.
-She doesn't try that hard to learn. I'm 100% sure Hopper would've gotten her necessary supplies if she asked to learn, then she acts like an idiot (the Illinois thing)
-Lets be honest, she wouldn't be anything memorable without powers, that's literally why Dustin accepted her. This proves her character quality is weak.
-She pushed Max's skateboard back, after seeing maybe 10 seconds. She judges by first impressions, then later doesn't give Max a chance and walked past her.
-She only noticed what she wanted to. Again with the Illinois thing, she noticed Hopper and 'Will's mom' yet completely ignored that Alexei was there, she could've added that there was 'a man'
There's more proof, but I'm gonna leave it at this cuz of the length of this post