Internet constantly dropping - recurring issue

I made a post a couple months ago about my Xfinity wi-fi dropping periodically throughout the day. At that time it was happening every 5-10 minutes or so whenever someone tried to watch Youtube, Netflix, or even just browsing online. My whole network would go down and the Xfi Gateway would flash orange and take about 5 minutes to reboot. There would be 'Good' days where it would only happen a 5 or 6 times a day and then other days where the internet was basically unusable. I went through multiple gateways and would always get the same issue.

In April a technician came out and changed some of the security and settings on our Gateway. At that time I also bought some Wi-Fi extenders and placed them around my house, I was thinking the Gateway couldn't handle all the devices. (Maybe 15-20 total devices; TVs, PCs, cell phones, game consoles, etc. only 2 people live in the house).

My network rebooted once right after he left but then it went the next day or two without rebooting. For the last couple months it would only happen a couple times a day and just figured that's what I have to deal with. 

Last week the reboots have really started to ramp up. Back to where it was in April. Just in the 10 minutes I was writing this post my internet rebooted 2 times.  

The internet is great when it works but the constant rebooting is just very frustrating. 

I've tried disconnecting all devices except one and it will still happen. I've looked into the gateway settings. Any ideas or suggestions would be appreciated, thank you !

My event log is just pages and pages of this: