I have enjoyed the option of multiplayer since it was added but as of late have become very irritated with so many of the other racers.  It would seem that there are a great number of people playing whose only objective is to interfere with other drivers and not to drive their best.  If they are trying to come in first, they tend to do it by nefarious means.  There have always been those who want to try and ram you off the track or who simply won't get out of the way for faster racers to pass.  Now there are also those who seem to love stomping on the brakes any time someone gets close behind them.

As usual in this world, it is humans who always ruin any experience one might enjoy.