Video games are designed to make you hooked and extract as much as they can from you. You are slaves on the world they created, wasting your consciousness away on a virtual world. And the grinding games are the absolute worst, its just the same gameplay over and over.
Gaming addiction isn't very different from any other additions like alcoholism, drug addiction, food addiction or compulsive gambling. in fact, any possible addiction is a disorder of the brain's reward system. Some people can't consider video game addiction as a real problem because computer games are legal unlike drugs or alcohol in some countries.