What is bad about derivatives?

Could you please elaborate on the downsides of derivatives? Could you explain what makes them potentially problematic? Are there specific risks involved in trading derivatives that investors should be aware of? Could you discuss the ways in which derivatives might negatively impact financial markets or individual portfolios? Additionally, are there any common misunderstandings or pitfalls that investors tend to fall into when dealing with derivatives? Could you provide examples to illustrate these points? I'm interested in understanding the potential downsides so that I can make informed decisions when investing.