Satmar, Vizhnitz, Belz and Ger are organizations. As an organization, they can be criticized. People who happen to shtam from Stamar, Vizhnitz etc. blood are simply chassidim and cannot be criticized based on who they are.
The criticisms I have on Satmar and Vizhnitz in particular have nothing to do with how they treat halacha, mesora and Yiddishkeit in general. It has to do with how the organizations are run and their official policies and reactions regarding certain things. The fact that I disagree with many of these policies, many of which are quite dangerous in both ruchniyus and gashmiyus, (some of which I have personally witnessed) and find little value in the good that they do, makes me an anti-Satmar and anti-Vizhnitzer.