The president can tell you are not happy but the only thing you would get is a salary bump which according to you is not the reason you are unhappy. The way you described it, might as well take the new job.
Next time you are in a similar position, be ready to leave before announcing you have an offer. Also if you tell them you have an offer and they want you to stay and ask what you want, have a list of what change you want and make it as concrete as possible (beyond just money). And if they can't make it happen, at least it's clear you shouldn't stay.