Hi. Initially had difficulty connecting my 5 newly acquired Wyze Cams to my home network. I live in Longmont, CO (fastest internet in the country) and have symmetrical Gigabit fiber direct to my (modest) 1/2 rack (10"). Running Mikrotik RB750Gr3 router hardwired to most of the house w/ 3 TP-Link Omada EAP225 v3 in mesh configuration carrying the WiFi payload.WiFi is relatively robust: having no difficulty with multiple IOT devices, switches, phones, Google Home devices, irrigation controller, 2 HD Homerun tuners, and various other stuff.
My PITA B-Hyve WiFi irrigation controller
Shut down every Access Point other than the one nearest to your devise. Go into the settings of the devise in closest proximity to the camera you wish to set up: disable the 5ghz radio. Connect (hopefully) to your 2.4ghz SSID with relative ease. Once connected, restore all settings to all APs. Don’t know why these devises, and others are sometimes persnickety, but they are.