Yes, you can remove it using the "uninstall software" option inside Playonline.
It's a little silly in my opinion to decide "what a poor game" given that you really can't have played it for that long, there are plenty of people who love it. Just needs lots of time is its main problem! On the other hand it's going to have trouble suceeding at £40 + subscription on the 360 when it's available for £10 or less on the PC.