I worked for an ISP help desk for years. I loved it.
I think my experience was a bit different to most phone work though. All the calls were initiated by customers. Even when I was calling outbound, it was as a follow up to someone who wanted to speak to me. Also, we were helping people, so they’d be happy and grateful at the end of the call.
Finally, it was the 90’s - the Internet users were far more technical than the average person today. I could walk most callers through their computer/modem settings pretty easily.
There might still be phone work out there that doesn’t crush your soul. I don’t think it’s the work itself that’s awful, rather the setting they do that work in and your coworkers/employer that are the problem.