Wifi signal in house is trash

Some tips for improving WiFi performance;

http://corporate.comcast.com/comcast-voices/10-ways-you-might-be-killing-your-home-wi-fi-signal 

https://forums.xfinity.com/conversations/internet/answered-how-to-improve-your-xfinity-wifi/602da486c5375f08cd804f16 

https://www.xfinity.com/support/articles/internet-connectivity-troubleshooting?linkId=180985598 

There are other options. Google for WiFi repeaters / range extenders, WiFi mesh systems / pods, powerline ethernet adapters, MoCA adapters. Good luck !

https://www.cnet.com/how-to/your-router-isnt-as-fast-as-you-think-it-is-heres-why/ 

https://www.cnet.com/how-to/home-networking-explained-part-2-optimizing-your-wi-fi-network/ 

https://www.smallnetbuilder.com/wireless/wireless-features/wi-fi-ping-spikes-causes-and-fixes/ 

Greetings @user_3r82p6 thank you so much for using our Forums to contact our team. We are happy to review your connection and see how we can help. We are just going to need your full name and service address over DM. Here's the detailed steps to direct message us: 
• Click "Sign In" if necessary 
• Click the "Direct Message" icon (upper right corner of this page) 
• Click the "New message" (pencil and paper) icon 
• Type "Xfinity Support" in the to line and select "Xfinity Support" from the drop-down list 
• Type your message in the text area near the bottom of the window 
• Press Enter to send your message

@user_3r82p6 

Have you had a chance to see if any of those tips apply ? Please reply right here in your topic on these public help forums, thank you.