I had (technically still have) an ASUS 66U router that wasn't stable. I switched it out for Netgear Mk62 Nighthawk mesh and it's been great.

If Netgear isn't supporting your router well, there's not much to lose in trying different firmware before replacing the hardware. Might be handy to have any kind of backup router around in case things get temporarily borked. In some cases (like power grid failure), I temp used my phone's hotspot with a laptop.