Fallout 3

Been playing Fallout 3 recently.
It's not a bad game, but at certain parts in the game
I get the feeling I should have bought the PC version
instead of the XBox360 version.
How the HELL can I defeated 2 Super Mutant Brutes with Miniguns
when I'm still level 2??? NO CHANCE IN HELL THAT CAN HAPPEN!!!
I think I have to do an old tactic: GRINDING!!!
Level up as much as possible and then defeat those f@ckers!!!
But then again... that tactic can bite me in the ass aswell, since
a lot of enemies become harder when you level up!!!
It's the first time (in years) I'm thinking of selling a game.