You know literally nothing about me except that I've had a bad experience with a brand, so you come to the conclusion that I'm "simply using them wrong"?
Unbelievable.
A $400 Asus router I bought had a broken 2.4ghz band, was that 'using [it] wrong'? I had a motherboard fry itself, do you think I was in there 'mishandling' the motherboard? An Asus monitor I bought would periodically shut off and not turn on again unless you physically unplugged and plugged it back in, a faulty power circuit that I found many others having issue with.
It truly is rare that someone may have so much bad luck, since QC is automated these days. Perhaps you may want to check your home's circuitry for noise or spikes, or install a power conditioner?
I'm not a lawyer doctor or electrician, full stop. Anecdotally, however, I've used ASUS for a couple of decades, and it's been above average in my experience.
I'd hazard to guess the router was something like https://www.amazon.com/ASUS-Rapture-Gaming-Router-GT-AXE1100... not your typical 2x2 wifi AP + gigabit router combo. I say this because I once returned such a top end ASUS model 3x (twice to swap, 3rd to refund) as they were all just some form of DoA. I felt like I was going crazy to the point I took the 3rd one to work to unbox it thinking. Based on the number of 1 star DoA reviews at the time vs the reviews now they seem to have figured it out.
Overall their support is a bit lacking for the high price point stuff if you turn out to need it, the low end or normal stuff I have no complaints on.
> You mention a fried motherboard -- this is not caused by the board itself, but from too much current being put through the board.
Though one leading cause of too much current being put through the board, besides too much voltage at the inputs (in case of a power supply fault), is the motherboard drawing too much current. Which can well be caused by failing components shorting out, for example. Or a voltage regulator on the board producing too much voltage.
Saying a fried motherboard is generally not caused by the board itself is not true.
I think you're simply using them wrong or handling them carelessly.