Wifi Drops Out Intermittently

Really noticeable when playing games but sometimes also kicks us out of apps on our phones. My in-game connection graph looked like this.

This graph is a 2 minute period with the connection timing out very frequently.

After talking to a Xfinity rep, they were very nice and offered me a better modem to help the problem.

I'm afraid it has only helped a very minimal amount as this is the new connection.

I'm not sure where to go from here. the connection is great, but it struggles to keep a fluent connection on wifi.