I totally get that, same here.
But ultimately you can't just blame people. There is literally an entire industry trying to sell you cheap carbs and fat. Down to the sound a bag of chips makes when you open it (this is not a joke).
So on one hand you have evolution, your body still being stuck in the past where food was scarce. On the other hand you have too much food and it's highly engineered to be addicting on purpose.
It's no surprise most people are going to lose that challenge.
Sorry, but that's literally every online service. For example if you buy a new virtual server it takes like 5 minutes till a Chinese IP starts to try root passwords.
If someone actually wanted to harm Lemmy they'd just DDOS the biggest instances for a month (which would be easy, it's mostly single servers after all) or attack it with so much spam and large images that storage would break.