That Megafist is so shiny and purrty. Also had Unarmed skill somewhere in the 160's I think. And powered armor did help too. So he wasn't exactly helpless. Though boxing with the end boss took a while, and a couple of game reloads.
But yea, low INT chars are usually not a good choice to explore the game initially. I think the cut off number for dialog options is INT of 4... Any lower than 4 will make you a "child of nature". As Hakunin so politely put it.
Once you played through and know the general directions and plot however, FO BARs are extremely fun to play. Challenging at times, but quite fun.
As for the Jinxed moron, these can be fun too. You can either boost up your LK, or really drain it. Jinxed with 1 LK is pretty challenging, and try not to fire too many energy guns. They have a way of exploding at the most inconvenient time.
"So, how does a 1 INT char use a slot machine?"
Well, I don't want to spoil it for ya. Let's just say it involves a lot of yelling at the shiny one armed man.