Ah in that case, definitely chuck it in the river then (or the cesspit that is eBay) and get a well fitting roadbike The Escape is however still a road going hybrid, no suspension and what not. Can always fit narrower slicker tyres in the summer
But see a physio first
Something need to change, question is what?! Could be anything but the bar ends idea sounds like a cheep way of getting an adjustable reach/hand position, tbh if I rode 30 miles regularly on flat bar bike I think I'd be getting stiff too.
Ref the neck do you stretch properly etc after riding?
Nope.Arms out straight in front of you right now, palms facing downwards, now turn them facing each other, anything going on in the shoulder or neck area?