Some argue that ESPN having an objectively bad ranking system doesn't mean they intentionally designed it that way, but...

They did design it.
It's been around for 10+ years.
It does what it does.
What it does it important to their business.
They have the option to change its behavior.
If they didn't like what it currently does, they would have changed it by now.

So, it's pretty hard to argue they do not like what it does.

So it's pretty hard to argue they do not intend it to work the way it does. They created the system, they have had many opportunities to change it if they wanted to. Whether that have actually made any changes over time is irrelevant. Ten+ years in, the intended purpose of the system is indisputably whatever it does, which is rig the CFP by dramatically and irrationally boosting the rankings of some teams, while dramatically and irrationally depressing the rankings of others.