Infinity app guide issues on Samsung tv's

The xfinity stream app does not work well.  Navigation is hit or miss to pull up a channel guide on various smart tv's for simple live tv.  This continued dysfunctional solution has me reconsidering a media provider after 30+ years of loyalty and paying monthly bills and being charged extra for every enpoint device.  The equipment should be part of the monthly invoice not extra rental charges for every device to deliver content.  My signal also sucks after so called improvements in my area back in April that dropped the input signal level to my premise significantly.  This created a daily poor experience.  My xfinity cable modem had to throttle up to even work. During the so called upgrade in April.  Service quality has been suffering and I am strongly considering to cancel.  I professionally operate rf and internet services professionally in the commercial environment.  I possess test equipment to analyze and meadure various signal standards so I know the technology in and out.