Considering we have a whole company using Apple products (iOS and Macs) and pretty much everyone connects to Wi-Fi all day long while working, I'd say we haven't really seen any of these "serious Wi-Fi issues".
Our family has owned quite a few Apple products over the last decade too, and again? No real Wi-Fi issues to speak of.
If you can prove wireless malfunctions often enough to easily demonstrate it in an Apple store, then sure -- it should be addressed. It can be things as simple as an antenna coming disconnected inside, or a wireless radio that's simply burning out. (Heck, I saw older D-Link routers all the time that would technically keep functioning, yet the radio in them got so weak, you only got a wireless connection to it when holding the computer less than a foot from the unit. It happens ....)
But IMO, the idea that Apple is any worse at doing Wi-Fi than the competition just isn't true. What is true is that Apple likes to use the latest tech for wireless in its new products. That means yes, you'll find some compatibility issues with older (especially non Apple) gear out there. They offered people wireless "n" when the industry was still using mostly "g", and now "ac" when barely anyone else has it yet. That's just the price of staying on the cutting edge though.