Then don't bother. I'm not being argumentative, but if you see no compelling reason to bother then don't. PC gaming is expensive and can be fraught with frustration.
What will you do if your power supply goes bang? Or, for that matter, any component? What will you do when your computer needs upgrading because the £300 gpu you bought is no longer powerful enough? How would you deal with not being able to play a game on launch day because servers can't cope? These are all things a pc gamer has to put up with.
I do it because the titles I want to play are PC exclusive and I have enough interest and disposable income to satisfy that interest.
I mention all this because you don't seem to have the patience to find out solutions to problems on your own. And the problems you've mentioned are fairly easy to fix. I'm not criticising you for this at all, some people just don't have the patience. But this will not be the last hurdle you face if you choose to game on a PC.
Not being funny but I have tried. And I'll try again this evening! It's probably fair to say I'm quickly running out of patience but I haven't completely given up! It's just punkbuster, it doesn't do what it says it should do! It doesn't install anything into the BFBC2 folder apart from a pb folder which has nothing useful in it (as far as I can see).