Dude you can't have tried THAT many times and not gotten it by now. Just give it some time and make sure you memorize the course. Once you get a good lead on them you can just take it really slow from then out and make sure you hit each turn right.
Also, the game gets only better after this part so I suggest you beat it.
One technique I found very useful was to go full speed into a turn. However, make sure you are going full speed and then RAM a bad guy car that is in the process of going around the turn. Not only will you f**k his car up and spin him out of the race...your car will take the impact and slow down and you can then now make the turn. The technique is a little hard to explain but I'm sure you'll get what I'm trying to say.
If you cant do it after this...then I dont think this game is worthy of you playing it and YES you should sell it
