madara stated himself that PS is his full power & it comes from his ems. the meteor got demolished by PS which is canonically inferior to hashirama even when fused with the kyuubi. limitless chakra isnt an attack.
Your post made me laugh.
Did you not read.
Rinnengan... let me tell you again... Rinnengan.. that alone should be enough.
but wait there is more...
He can ultimately spam meteors... from what ive seen in the fight... Hashi was barely able to deflect a Biju Bomb... lets try 3-4 meteors and see how he does.
Maybe you dont understand what it means to have unlimited chakra. Im not going to waste my time explaining that though.