All history is written from a biased perspective. The winners generally record the past and tend to take into account only most of the positive things they did as opposed to the bad things that they don't really want other people to know. It's important to keep this in mind when learning about history. If you start to question the validity or truth behind something, then research it instead of just accepting it at face value. But even at that, negative things are kept in the records. For instance, the US had Japanese internment camps, which would be something to be ashamed of and that they would want to just disappear, yet it's still taught and is meant to be public knowledge.
History is not pointless. If we didn't know our past, we couldn't learn from our mistakes. Plus, history isn't just about numbers and records of right and wrong, it's also about the culture and lifestyle of the time period and the people. There is so much to history than just the accuracy of who won according to the 'winners'.
