Do I need to replace my charcoal BBQ smoker if it can't stand correctly?

It is very necessary for you to replace your charcoal BBQ smoker stand because it will be a safety hazard to you and those who use it. You have the option of placing it on something else, although it may still be a safety hazard because it may melt the surface that you put it on. Therefore, yes, it is necessary that you replace the stand.