Try Powerline. This €40 device will turn your electrical sockets into an 100-500 mbps Ethernet cable. Simple and efficient. Just check if sockets you want to connect are on the same circuit breaker. If yes, chances are really high it would work very well.

I’ve connected a switch and a second access point with mine.

Also I think they work best if there fewer of them on the same circuit. But not sure. Check first.

Powerline almost never comes close to performance of wifi in the same conditions.

It's literally wifi just over an even worse medium.

Through thick brick walls?

Yes. Usually power line also jumps circuits in those cases which massively degrades reliability and throughput.

I tried that but the performance was worse than wifi.

G.hn powerline devices are better than the ancient HomePlug AV2 ones. Which devices did you try?

Does it have any wiring? I've lived in old homes with coax for cable and those can be used with moca adapters to do ethernet. They can do 2.5gbps too.

Oh, one more idea. You can use existing coax cables (tv cable) via adapters to get 1-2 reliable gbps over cable. For e.g. a switch with an additional access point