It's incredibly hard to make a case for Messi over Ronaldo right now. Can't say this about many people but Ronaldo's enourmous ego is probably his greatest strength, he goes out every game trying to be the best (by getting in position to score the most goals) because he knows at this stage of his career that's all he pretty much good for and in this era of football all fans seem to care about are scoring goals. Ronaldo's eagerness to be the main scorer could be detrimental to his team at time but his teammates are so good it really doesn't effect them much.
To sort of end this tangent, if Messi had that attitude/ego, I think he'd be a better player (if that's even possible) and we'd probably be a better "team" as well. For example, Messi coasted the pichichi this season without any hattricks, i think that tells us quite a lot, he's starts coasting a bit after we go up a few goals. Going to need him to take all penalties next season, stop giving them to Neymar and Suarez, it's not like they're good at them anyways.
Please board, be competent this window and give this guy the players he deserves to play around, still think we have a few amazing Messi years, just do your jobs.