You did buy the cheapest beginners set there is

Ok, this may need some explaining. The stuff you bought is the best there is. There is not much gear that exceeds these top products from Pioneer. In case you don't like the DJ-ing you can sell everything. And beceause it is such a great gear, you can ask a nice price for it again. So you will not loose that much money on it. This however requires you use the gear correct and keep it in good condition.
So actually I would advice everyeone to buy this, problem is only that the most people don't have such an amount of money to start using this from the start and therefor buy some less expensive gear to be able to start DJ-ing any way.