Performance is good but flakey. We live in a house but it's heavily saturated by neighbours blasting their WiFi. My throughput is great but latency and connectivity are super inconsistent.
Googling mostly gives useless entry level suggestions many of which are practically wrong - just set up transmission to extra high everywhere.
Any tips on how to actually make a good WiFi coming off bell home hub, on particular for phone cloud gaming?
If not, try to figure out what channels are used least by your neighbors and use those. For gaming, latency and jitter are more important than bandwidth (mostly), so prefer smaller channels/don't aggregate. Indoor only channels have lower power limits, so you should see less contention on them. DFS (radar detection required) channels are a pain to use, but if they're usable in your area, you'll likely see less contention, because they're a pain to use. 2.4Ghz channels are probably not worth it for gaming if you've got neighbors.
I am a fan of Ubiquiti gear, particularly the higher end hubs can use channels that are usually blocked because of the potential to interfere with weather radar around airports. Better hubs can move frequency if there is a problem so they can use a vast area of the 5Ghz band that is usually unused so less interference.
Multiple hub systems are also good because two devices on different channels don’t fight for one channel. Even if the second hub has a worse connection than the first hub the benefit of having a less congested hub is usually worth it.