At what point did you just stop giving a F*** at work?

After the first few paychecks and you realise the kind of people you work with; or work for. For me personally, it was my gf telling me how my personality has changed and I seem stressed and angry at everything all the time; which is true because my fuse is definitely shorter than it used to be. Also my parents mentioning things, and my dad saying randomly in a car ride "I know you can be happy, because I've seen you happy". People seem to have realised how work was affecting me more than I did myself, which is when I started listening and really thinking about it. When I go to work, I barely talk to anyone and I just don't care anymore, I zone out and look depressed most of the time. The person I hate most and have had clashes with asked me if I was okay because I had a "resting bitch-face" and I just ignored her. For context, I (M 26 UK) work in a care home on night shifts. ALL of the night staff are African, barely understand or speak English, and their common sense is lacking in places like they won't read medication charts when giving medication, they just do it off memory (which is very bad practice). The day staff are mostly middle-aged women and you can imagine the vipers nest that is. My manager is autistic and has anger issues and usually comes in in the morning, complaining, throwing things around, and an attitude you don't really appreciate when you're finishing your shift. And the pay for what you have to do, wiping literal shit off someone's arse, handling controlled drugs and medication, working in a thankless job and toxic environment nobody appreciates. So, I just stopped caring and now it's the same as any other job; I only want the money. As far as I'm concerned, the residents are alive and healthy, dressed, fed, and cared for when the day shift comes in at 8am and I hand over to them, so my job is done. The manager doesn't need to know if I spend the whole night on my phone trying to keep myself awake, or sometimes I'll bring my switch or steam deck and play games. I don't see how it's any different to watching the TV like the day staff do all day. The night staff also do the majority of the cleaning, but I do the bare minimum because the state the day staff leave the house in for us is disgusting. I should mention the residents are quadriplegic with cerebral palsy so there's no way they would make a mess even if they tried; it is literally fully-grown adults just living like utter pigs and not cleaning up after themselves and the state it's left for us to clean is absolutely disrespectful. None of my "I don't care" attitude ever affects the residents but working in care is such a demanding and stressful job enough without colleagues and management making it worse for no reason. So eventually; I snapped. I had a mental breakdown and took 3 months off work because I couldn't take it. When I returned, I learned to care less because it was my insistence on trying to please people and be involved that caused me to burn out that badly. Something switched in my brain saying "my mental health is more important than the manager shouting at me because there's a mug stain on the kitchen counter" (I'm not exaggerating, she would literally scream and shout and throw something just because there's a packet of crisps behind the sofa or an empty coffee mug in the windowsill). I became reclusive and still am; rotting in my room. When I'm not sleeping I'm working, and when I'm not working I'm sleeping. I don't even have the free time to go out and make friends even if I tried; nevermind have enough time to see them. I'm lucky if I just get time off for my own birthday or to spend time with my family. The depression kicked in harder than ever before and I'm just stuck in this hole where everything is pointless and hopeless but I need the money to survive. For "working in care", I have to say it is the absolute least compassionate work environment you could ever possibly work in; even bus drivers get more "thank yous" than carers do. The health and social care sector is crumbling and falling apart and I do NOT want to be put in a care home after working in one, seeing the lack of care people have and the amount of mistakes happening due to stupidity and ignorance. Neglect is rampant and when I report it, management makes every excuse they can just so they don't have to go through the whole whistleblowing process. If management doesn't care about me or any of my concerns, then neither do I.