Yes, this IMO is the biggest flaw in bitcoin's design. It makes miners impossible to commoditize. As soon as a new ASIC becomes widely available, it defeats itself and becomes useless at the next difficulty increase.
Consumer ASICs stopped being a thing for this reason. Now we have mega-secret custom hardware that can't be shared without destroying the investment put into their development.
I don't think Satoshi's intention was that only a handful of massive investors with their own proprietary chipsets would be able to mine, but that's the natural consequence of the difficulty mechanism, and it really undermines bitcoin's core principle of decentralization.
