Internet Connection is terrible

Hello all~

I have the Xfinity router that was provided and am hard wired into it. I pay for up to 2000mbs as I work from home and do a lot of upload/download plus my boyfriend and I play a lot of video games.

I cannot stream a video on youtube and play an online game at the same time. When I do speed tests, I barely can get 800 mbs with nothing running on my computer. On top of this, it constantly micro disconnects.

My port forwarding doesn't work either.

I've hard reset the router multiple times and it does nothing.

I have no VPNs running, I barely allow Windows Defender to touch much.

I do not want to have a service that does not work. Does anyone have any suggestions?