Its that bad, I might get some more routers and just blat the 2.4Ghz band, and move to a 4G dongle myself. Though then I cant use network devices.
Obviously, I'd have to turn off those 13 routers when I wanted to fly something, or play with the RC cars.
Pretty much what I use, have done for years ever since BT thought it was a good idea to dribble 1 to 4mbs on Broadband around here.
I use a Netgear Nighthawk LTE Gigabit Router not the best but it's a decent LTE Cat16 spec which delivers me 250 to 420mbs down and a reasonable 150 up, all depending on what's happening on the M25 just down the road, the 4G SIM which is actually a 5G UL Plan deliverers my needs and doesn't cost me much because been with them for years now and beats anything that Virgin or BT can currently offer.
Prior to the Nighthawk I was using a Cradlepoint LTE Router with all the bells and whistles untill they decided last year they wanted $200 a year Licence just so I can access my Router, so that went, which was a shame because it was a bullet proof device.
Also go an Huawei 5G LTE Box sitting around somewhere doing nothing just waiting for EE or Voda to give me some 5G Coverage around here.