I don't know why you start that all over again but anyway:
1. I simply don't see leadership as a defining quality of a footballer. That's something which only emerged in recent years by Cristiano Ronaldo fans searching for arguments in this very discussion. Nobody would've said 15 years ago "well, I think Ronaldinho is a worse footballer than xyz because he's no leader". In fact, many of the best footballers in histories were egocentric divas and as such terrible, terrible leaders. Which leads to my second point:
2. We have no evidence at all that Cristiano possesses remarkable leadership apart from being a role model in professionalism. This whole narrative stems from some touch line antics after he got subbed off due to injury. On the other hand, Cristiano has shown terrible, terrible leadership skills during multiple occasions at various stages of his career - worse than pretty much any great footballer I can remember. Like cursing when a team mate scores a goal, openly criticizing the second row of his team for being too worse to play alongside him, etc. Even if it doesn't fit this preferred narrative, those things have happened and they alone are enough to disqualify him as a good leader. I think it's actually ridiculous that people call him that despite of those things. I'd find it horrendous to work for someone with such egocentric habits and everyone who has anything to do with the topic leadership will confirm you that those are absolute no gos. Yet, as stated earlier, this has nothing to do with his quality as a footballer. Actually his obsession with his personal success is probably what made him so good in the first place.
3. You can recount how good Messis team mates for Argentina were as much as you want. Argentina was never a functioning unit in the past 15 years and Messis not to blame for that. The best Argentina side he played in was probably Pekerman's Argentina in 2006 and Messi was what, 17 back then?
You maybe had a point if Messi had actually been playing bad for Argentina but that was never the case. He showed the same skills as he did for Barcelona, just less frequently respectively with less end product because the teams he played in didn't work as a collective and were painfully dependent on individual brilliance. Honestly, I don't understand how people still don't see this in a time in which coaches like Klopp or Guardiola prove how incredibly important that aspect is. It's so painfully obvious nowadays how a functioning team affects the perception of every single player in it. Yet people pretend it's his fault that Argentina was in such dreadful states during his career. I mean, at some point, he was coached by Diego Maradona at a world cup. For once, let that really sink in.