Ive never hand as issue with Realtek. It was Atheros always dropping drivers, and then my 2019 asus notebook dropping wifi inspite of using intgrated intel wifi adapter with drivers.
If you have problems check the router settings then transceiver settings/drivers.
I think the above alludes to the bigger point here. No brand is immune from issues. And certainly, different models within the same brand may perform differently - despite the exact same protocols and standards they must follow.
Also, network performance (including continuity) depends on much more than just the NIC in our computers. For Ethernet, the router/switch on the other end must be equally robust and stable. And then there are those cheap, flimsy, fragile, often poorly made (and why I make my own), but
absolutely critical network devices, the Ethernet cables (and their connectors) that play a major, but often overlooked role in network performance.
Similarly for wireless, there is the wireless NIC in our computers, but also the WAP (wireless access point) - typically integrated with the router or "residential gateway". But there is so much more. The antennas are critical. And not just the antennas themselves, but their placement and orientations.
And then, of course, there is what's in between, blocking, attenuating, interfering with the two-way "RF" signals.
The point is, network connections and performance is an end-to-end, two-way "system", where any part within can be the weakest link.