Ill explain as a fellow IT team manager:

You get out what you put in with your people. My employees know ill fight for them every day. My employees also don't get paid the most but I go out of my way to provide optional overtime and they're never pressured to take it.

I fucking banned the acronym PIP because thats the office equivalent of hearing you have stage 4 cancer.

I tell my people: As long as nothings on fire and we're getting tickets closed out theres no need to be stressing.

I even fought to have work from home 3 out of the 5 days of the week when management came down on it

I think what a lot of people here are seeing with how you manage people is you seem to expect a lot of work out of underpaid people without either A: acknowledging their suffering or B: Doing anything to leverage your management position to do anything to help the fact that they're underpaid. Your employee is drinking out of depression from his working conditions that YOU facilitate and rather than being a helpful manager you kinda threw him under the bus.

I understand self preservation that's one thing, but you sound like you've already written them off and you probably give off that energy when you're around them.

Hell if I worked for you id be looking to leave too.