Pot..., not too bad.
Meth... very bad.
Heroin... look up deaths compared to alcohol, per capita.
Alcohol... very bad. it's a bad drug. Say what you will. How many lives has it destroyed? Families? How many people has it killed in cars? How many thousands has it killed outright. If Alcohol showed up now, as a street drug people are using, it would be outlawed very quickly. Yet we have large populations dedicated to stopping drinking. In SoCal where I live, whole supermarket isles are dedicated to alcohol. But since alcohol has been around forever, it's accepted as normal, in general.
Just because it's accepted generally, doesn't make it a good drug. I'm not against people social drinking. I'm not against people using it even for drug-like purposes. But I do think the latter is dumb.