I don't block instances. I block communities and users. An instance is too large a group of people. They're not a monolith. Some people on hexbear are garbage and some are not. Some topics encourage jerks, some do not.
unpopular opinion time: hexbear isn't that bad. I've had to block a few communities, but I do that with any instance. I've had to block more on hexbear, but it's not a ton. I've had to block more people on hexbear than other instances, but it's not that bad. I appreciate their different viewpoints. I don't like echo chambers and I learn a lot.