Is it just me or has something been off about life?

I am a real person I do not use artificial intelligence at all when I am writing for this website. This means I have emotions and I am a human being and im conscious. I appreciate life I dont think its a utopia of any sorts and I also dont think its my "oyster" as what some people say I kind of just exist you know. My life is not difficult it rarely has been but for some reason im down all the time like im really not sure why you know? If I back up and look at my life in a nutshell and my situation at the moment there is nothing for me to worry or stress over besides the usual things us humans stress about like finances and the people the care about earnestly. If im being honest I wouldn't say im living for anything or at least not anything external I live for myself although that does apply to everyone else. Most people say they live for people, pets, money, sex, and drugs but what we all really live for is ourselves. Is that a good thing? Well you would have to answer that yourself to get what I really want to say is I may have mental health issues now mental health is not unique or taboo especially when it comes to gen Z but I dont think it should be romanticized its not comfortable to live with. Now I can say for certain because legally I am not diagnosed with any mental health conditions my record is clean I am just the average person. These past months have been heavy to say the least remember when I said before I was living for myself well when you hate yourself you dont want to live for yourself this is where the philosophy of just existing comes into play. You are just a conscious being that breaths and does whatever it wants this is where I am at I can still appreciate nature and most things about living and life but I dont respect myself anymore I dont want to live for myself I just want to exist which is honestly where most people are at in life I may have depression and schizophrenia now I know I cannot diagnose myself with anything but my behavior and the tricks my mind has been playing on me strongly makes me believe I have mental illness. Mental illness is fine to have if your broken or your fucked up in the brain thats fine as long as you exist and you dont suffer constantly life is good. You may hear you can always reach out to a hotline or someone close to you which is true but I strongly recommend you review the person and your psyche before you do it most people get stuck up or extremely worried if you open up to them about your mental struggles.