The thing about dopamine is that it doesn’t really reward the body once it responds to the addiction. it just creates and addiction and usually doesn’t even get a reward for obeying the addiction. Usually its the addiction itself that gives the reward, such as masturbation or eating candy. With the case of social media its the case of an addiction that does not give a real reward, in fact it usually just increases stress. I guess sometimes there is a reward, such as not being bored anymore.
People especially the tradcucks give marijuana a bad rap. Its not really a dopamine but a cannabidol, very different.