Yes, but nobody is lobbying for worse interview processes and if anyone has an incentive to make it better, it's employers (for whom it is disproportionally more expensive).
People love to poke fun at it, but employers are not trying to make it bad. It's just a hard problem.
Even a single person can be hypocritical or self-sabotaging sometimes. And "an employer" is often not a single person but an organization with a bunch of people pulling in different directions. Some people making hiring decisions or deciding on hiring procedures may not necessarily care about the procedure being "bad". Maybe they e.g. care about maintaining "standards" or whatever justification they came up with.
Unless you have a novel insight, let's assume that market forces apply. Yes, we all had bad experiences — and they go into the calculus. A company that creates consistently horrible experiences for their candidates will be taxed by the market.
People love to poke fun at it, but employers are not trying to make it bad. It's just a hard problem.