I've pretty much ran down everything i can when trying to fix this issue. I believe my internet cant handle all the devices connected to it. (50ish devices, large family) My father currently pays for 900 down and 110 up (it's the best we can get) So anyway all the ethernet ports are in use and my parents don't want any cables to be routed around the house so that was never really an option to begin with.

I've watched Youtube videos messed with windows settings and windows registry etc.

I have also been wondering on if those aftermarket routers are any good that i believe replace the OEM from your ISP? Example of what i mean: TUF Gaming AX3000 V2 (TUF-AX3000 V2)

Screenshot of a speed test.

Also just to add my ISP is BT i live in the UK (small village, but i have fibre) I also currently use a BT halo which is like a powerline adapter but it doesn't plug into the OEM router is connects wirelessly.

Any help on the matter is more than appreciated.