In my opinion there must be strong evidence that internet connection is one of the reasons why gamblers can lose at gambling (Casino), but so far I have never experienced what you experienced, the losses I experienced were more unlucky if that happened because internet connection is not what I am aware of.
Internet connectivity can be a hindrance to your winning but it is quite rare because most of the casino house or betting shops are always equipped with internet connections because there business is specifically internet related and there is no way that they can play with their business just because of internet.people can use so many things as an excuse to console their losses and internet connections can be one of their biggest means to back up their losses in gambling. I have never also experienced internet connection problems while gambling. Because I believed that loss is loss and whichever it comes from while gambling then it is also a loss.