If the sole intention of WoW was to come closer to Hashem through davening and being medakdek in doing mitzvos, everyone who attacked this group would owe them a huge apology. HOWEVER, this is not the case.
The leaders of this group constantly make videos, talk to the press, announce things on their website, and talk about themselves to gain publicity. These actions honestly overshadow their performance of mitzvos and stain theim. WoW also causes fighting and controversy. Because of that, while in theory what they do is okay, the WAY in which they do it causes so much problems it would be better if they didnt do the mitzvos at all!