Xfinity is Comcast which I don't think has much connection to the Baby Bells or their reconsolidation. Unfortunately the the cost of running cable to the broad US suburbs is a pretty big natural barrier to competition.

https://i.redd.it/7v0zi94tms181.jpg

Too bad we can't treat laying cable as a public utility, then multiple companies could use the same infrastructure to compete.

Instead we ended up paying for dark fiber with companies having no incentive to use it.