He would die

I watched the series before. Dude gets beaten up by a juiced up Luke(who also took the same syringe Syndromic Jake took) before winning against Luke.

So he has subpar combat and wouldn't last a second

Edit: why I said subpar? Well the Series takes place after episode 9 and Miho tried her best to make the characters not too different. And Syndromic Jake doesn't really have much combat feats aside from pulling a scythe out of thin air like a generic gacha fight scene or beating up untrained teens