Thankfully the system exists whereby one person (you) doesn't get to decide that.
Over-pathologization might be an issue, but isn't really the topic of discussion. Trying to misdirect the argument from "there's widespread depression" to "it's probably something else" is exactly part of the problem.
The OP is putting forward the same, tired arguments that "feeling like this is normal, get over it". Clearly and admittedly he has no experience or qualifications, so how the hell does he know?
http://hyperboleandahalf.blogspot.ca/2011/10/adventures-in-d...
Your assertion that credentials are needed in order to form an opinion about what is and is not normal human experience is in my opinion ridiculous, and it borders on the "appeal to authority" logical fallacy.