When you're reading these books, ask yourself this question: what part of this would be useful to apply to my specific circumstances? Not everything in those books are useful for everyone. It's up to you to figure out what's going to enhance your life and what's going to create more difficulties.

I'd also like to say that everyone has bad habits. That doesn't mean they are toxic people. Also, it's not your job to police their bad habits. If their habits involve behaviors are negatively affecting you, set a boundary instead of cutting them off. And remember, boundaries aren't about changing them, it's about keeping you safe. Safe, not comfortable.