People complain because they do not like change. The PVP'ers like the old spam click PVP cause it is exciting and fast paced. The 1.9 PVP is more bow oriented and slower paced with the change in the click rate. I like the 1.9 combat because it adds a challenge in survival. I cannot spam click because I have lag so the new pvp helps me even though I am still bad at it. I have watched pvp battles that last forever because of constant gaps/pearling/pots. I would rather the battles be shorter and more strategy oriented with bows and melee combat. Any new updates receive criticism since people are more likely to vent rather than praise. Its just the way social media and the internet works for people. I read tons more hateful messages than positive ones. We should be thankful Mojang has done what they have with this game we love so much. It could have stopped back at the survival/nether update but they decided to keep updating. Mojang gave us a launcher that allows us to play the old versions if that is what we like. I see many servers that use parts of 1.7 (cannoning physics) mixed with 1.8 and they make it work for the community. Mojang gives modders codepacks that allow them to make add ons and minigames galour. This is a game that is still popular after 6-7 years of release. There isn't many other games that can say that after 1 year much less 5 or more.