How to set up MikroTik hAP lite for stable operation?

Question

WiFi

Recently, problems with Wi-Fi on MikroTik hAP lite (RB941-2nD) have begun.
- At times, the speed sags that the preview photos are not loaded.
- Sometimes Wi-Fi may fall off. At the same time, the router is in working order.
Connected via Wi-Fi 3 phones + laptop. By cable - SmartTV. On TV, there are no problems with the internet.
I sin on a large number of Wi-Fi networks around, which leads to interference. But I don't know how to overcome it.

Answer 1

I sin on a large number of Wi-Fi networks around, which leads to interference. But I don't know how to overcome it.

Switch to 5GHz

Answer 2

As an option - by access point to each room at minimum power, up to AP - cable