More like standard capitalism.
The usb c connectors are not slower then the lightning connectors so its not like they made it worse. They simply refused to make it better.
A bit like Nvidia continuing to maken better gpu chips but refusing to have them release with a more VRAM.
If course in a way, all for profit-companies are malicious. Extracting surplus value from workers and such.
So lightning cables offer transfer rates of 480Mb/s - USB 2.0 offers 625Mb/s. You are cross that they swapped out Lightning for USB on the main models and use USB 3 as a differentiator in the Pro models. Fair enough, but that's not 'malicious'. It's not even malicious compliance.
Lightning connectors are definitely worse than USB-C, but when they were introduced the alternative was micro USB which is objectively worse than Lightning cables.
Of course, with wireless charging I haven't used an actual cable in five years so it doesn't matter that much to me.
If the aim of a company is to maximize profits then every company in Apple's stead would do the same thing. Not defending it but that's the world we created.