Internet Connectivity Issues

Hello, we've recently been having issues with our internet connectivity. It is especially prevalent while playing online multiplayer games (during the evening), but even just browsing the web we may get hiccups where the internet (maybe the modem) loses connection. My mom has already done basic troubleshooting and every thing looks all green, but I know there's an issue somewhere as this has never happened at this house until recently (a week or two ago). And I had a few other questions relating to maybe replacing our modem to see if that helps and seeing about upgrading our internet speeds.

I've also browsed through other forum posts to see if others were having similar issues and I found more than few posts. Links included below.

https://forums.xfinity.com/conversations/your-home-network/intermittent-connection-drops-and-packet-loss-every-1520-minutes/65e4c15045834d314f44d683

https://forums.xfinity.com/conversations/your-home-network/multiple-internet-drops-every-dayno-solution/66fac850de8d1e3b5f454774
https://forums.xfinity.com/conversations/customer-service/internet-dropped-again-and-again/676d9b20b9a9e87ca3435931
https://forums.xfinity.com/conversations/your-home-network/frequent-packet-loss-and-intermittent-lags-looking-for-answers/67904bd2ec3cb628263ab42a

Edit:

Sorry if I made the title too long, shortened it to the major issue we've been having. 

I'm still getting packet loss and internet drops while playing online multiplayer games during the morning. And post has been up for more than 20 hours without a reply from Xfinity Support...