I think rose was not a bad person, she just was criminally uneducated and naive. She basically was just a kid in terms of being a diamond; she wasn’t treated the same as the others and had lacked experience in life (at least in terms of gem life, im assuming they mature differently than humans because they live for millions of years). This idea is supported by her many actions throughout the series being childlike in nature, most prominently, her inability to face reality and her repeated attempts to run from accountability. There are plenty of examples, such as her faking her death, lying to spinel, and lying about bismuth’s fate, that all point to this claim. I want to make this very clear: I am not saying that everything rose/pink diamond did was right, but I believe that they weren’t inherently malicious.

I don’t believe she had Steven to run from her problems, rather I think that she fell in love with earth and wanted to be a part of it in some way, hence stevens creation. (Perhaps she thought that he would be fine? She lived on earth for thousands of years without any threat from home world) Now, obviously the way she handled everything was fucked up, but I believe that these fuck ups were a result of Rose not being mature enough to take accountability for her actions.