Instead of chaining them together, try to put the “router” in a central location and do what’s needed to limit your repeaters to a single hop away from the router. Chaining them together will lead to problems.

A proper mesh system will work better than repeaters. Some systems can use powerline networking to use your existing power outlets as a network, but it’s not always that great.

Some locations such as apartments/condos have really bad interfering neighbors on 2.4ghz. If that’s your situation then using 5ghz exclusively might help.