You know, I think I actually have 300 and not 1g lol — I'm a mess, I'm sorry.You need a new modem
https://www.tp-link.com/us/home-networking/cable-modem-router/tc-7610/#specifications
Only up to 343 Mbps
or downgrade your plan to 300Mbps.
I really don't understand why people need 1Gbps internet ?