It's just my anecdotal experience. Hinduism is a decentralized and diverse religion so my Hinduism might be different from my neighbour's Hinduism. The temples we pray in, the festivals we celebrate etc. are all different. My observation of ISKCON is that they are very conservative and sexist in their beliefs and more North Indian in their customs compared to other hindu organizations like the Rama Krishna Math for example. As a South Indian when I go to an ISCKON I feel like I'm in a building of a different religion. I personally feel that the ISCKON's interpretation of the Gita is kinda casteist and sexist and feels like "upholding the status quo". Note : this is anecdotal and my opinion and I will try to get some snippets on iskcons interpretations of the Gita if I find it.