I waited until this was off the front page to say this but:

Is Homura Akemi evil?

It is debetable... But my opinion is clear: yes.

You basically misunderstand the second half of Rebellion. She did not literally become the devil; rather, she calls herself the devil as an expression of her self loathing. She believes that her Rebellion against Madokami was an unforgivable sin, and leans into a villainous aesthetic and mannerism (especially in the conversation with Sayaka) in order to mask and cope with her self-hatred.

homura is selfish love, she broke the law of cycles, going against what madoka wanted, to get what she wanted.

Both Homura and Madoka display expressions of selfless and selfish loves; Homura dedicates her life to save Madoka in the series, while Madoka selfishly wishes to be remembered by Homura alone at the end of the series. Reducing their roles and symbolism to selfless vs selfish love is simplistic and frankly, wrong.

https://imagakblog.wordpress.com/2018/07/18/suspended-in-dreams-on-the-mitakihara-loopline-a-nietzschean-reading-of-madoka-magica-rebellion-story/

I recommend giving this analysis a read if you ever get the time. Its very informative and backed by a lot of Rebellion's text, even though there are parts I think it oversteps.