Pihole setup but doesn't work on PC

Hello, I just set up pihole and everything mostly works fine.
I had to fiddle with my Xfinity settings and set up my pi as dhcp server.
However I noticed that my PC which is connected to my Xfinity modem using an ether net cable does not in fact have internet connection. Both steam and riot client don't work, some websites don't work (but some do).

If I unplug the ethernet cable and manually use wifi on my pc, everything works fine.

Expected Behaviour:

I connect pc using ethernet and pi hole works fine.
Pi hole is running on a raspberry pi 4 b

Actual Behaviour:

Pc does not work when using ethernet and pi hole

Debug Token:

https://tricorder.pi-hole.net/4kWPKHLf/