How am I underestimating anything? This is a phenomenon that people have been subject to for thousands of years. Alcoholism has been around since the dawn of agriculture and people had far, far shittier lives pre-industry. Objectively. The current iteration of society is the best we've ever had. Just because we haven't found a way to balance our wealth and conveniences with personal emotional satisfaction doesn't mean you would be happier two hundred years ago. Quite the opposite, and you would probably die a lot earlier and lot more miserable.

edit: I know you hate being told "it could be worse" but it's TRUE. It shouldn't make you stop wanting a better life, but it SHOULD make you stop using excuses to not do the best you can with the short life you have. Take a hard look at your needs, vices and self-medication habits and try to ask yourself honestly how much time you spend mentally validating something that feels good but doesn't actually help you. It should make you uncomfortable to think about.