What does "support" mean? Let the feature continue working has it has. Sure. Yeah.

You shipped the code. It exists forever. You don't get to take it away later because it's not in your business interests.

Fix bugs? I'll pay for that if I want that. Software is a service. They shouldn't be obligated to fix bugs for free (unless they agreed to that in a contract).

With Windows 10 I'm not free to stop updating Windows if I want a computer connected to the Internet. Microsoft does dirty tricks to make if very difficult for me from completely stopping the update treadmill. They've shown that it's an arms race, too. I can't possibly keep up with that opponent.

Maye there's a fitness for service argument that could be made and that the software is dangerous in its current state. Disabling it is one way to make it safe and the license spells out what their obligation is to you when they do so.

Most EULAs disclaim all fitness for purpose, though. They restrict the rights of the end user (no reverse engineering, no benchmarking, etc) and disclaim away any and all liability from the developer (no warranty, not fit for any purpose, etc).