Saitama punching once is way quicker than Askin having to analyze what poison would have to kill Saitama. The shockwave from Saitama's punch would catch and honestly atomize Askin from the AP difference.
Askin running away isn't going to cut it. He isn't fast enough to out-run Saitama's shockwaves,
which can reach this far.
In order for Askin to actually win, he would need to:
- Run away
- Analyze and create a poison that would kill Saitama
- Shoot Gift Ball and hit Saitama or have Saitama walk into Gift Bad
- Wait for Saitama to die of poison.
In that time Saitama could have:
- Punched one
- Sneezed
- Remove the battlefield with table flip
- Walked really hard.
Saitama can generate shockwaves by just moving. Gift Ball isn't feasibly hitting Saitama because
Saitama can move and dodge out of the way and honestly skill stomps him. Gift Bad becomes irreverent when Saitama uses shockwaves because it gets blown away. And even if Askin SOMEHOW hits Saitama with poison, it doesn't kill him instantly. Saitama would end up getting really excited because someone can actually damage him and literally just punch once to beat Askin.