Is he acting rashly? Yes
Is he acting stupid? Yes

Does he have the time to plan? No

If he takes time to plan MISAKA 10032 would be dead by now... and maybe even Mikoto would have gone to fight.

Setting aside the Index incident... he was indeed thrown directly towards Lezzard... but Styl did give him information on him. He didn't plan though because he isn't a freaking genius.

And anyway... you were ranting about he forgetting what he did against Styl and Kaori... whereas the current Touma only has known Styl as a semi-ally.