Hydration is important so I'm with you on the first half, but what is the proposed link between reduced creatine intake and emotional wellbeing?

Why are you so sure that the poster (or anyone else commenting here) isn’t drinking enough water?

I drink lots of water. Lots and lots, to the point that it’s already kind of annoying how frequently I have to piss. I’m fairly skeptical that drinking yet more would yield any benefits.