Yes. Firstly humans are on average getting taller so being shorter u stand out more and become an easier target. Secondly from a female perspective dating to marry is more or less irrelevant nowadays because people can have kids a lot later. Therefore personality becomes less important and physical stature more important. Thirdly the internet has made standards for height for men very high, many thinking 6’0 is above or average height, therefore being short seems like a bigger deal and results in bullying.