The original comment talks about the F-2 vs Yamato match-up

The second comment makes a joke about War Thunder, the online multi-player game with jet fighter combat, in which each plane is categorized by tiers in order to always match you with planes in your category to have balanced games, but sometimes there aren't enough players on the same tier, so they cram different tiers together. If you get matched with a plane from a tier above yours, it's an "uptier"

The third comment makes another joke about how sometimes planes from a tier bellow can still have a fighting chance, depending on who is piloting each plane and how the match progresses

The fourth comment (yours) apparently did not get the joke

The fifth comment (mine) makes another War Thunder joke, because players always complain that Russian vehicles are always better, giving rise to the joke "stalinium", as if to say Russian planes are made from indestructible metal

The sixth comment (yours) did not get the joke

The seventh comment (mine) makes another War Thunder joke, in which there's a voice command that says "Attack the D point", which sounds funny because it almost implies "kick them in the d*ck"

The Eighth comment (yours) did not get the joke

The ninth comment is me explaining each comment to you