Shift your paradigm by comparing yourself to those less unfortunate than you. I assume since your on reddit you ain't in a 3rd world country getting bombed or starving. Got all your limbs? Disease free? Your 25 you can easily triple up to 75 if you really wanted it.I went through a similar phase as you thinking about all the shits that's wrong and all the mistakes. Been homeless, kept quitting jobs and was not working for years plus mental health issues. Fucked my credit multiple times, fixed it. Will be making payments to both to the government and car insurance fuck up for years. Past is the past it is what it is it's all on you to shape your future.
Man up means take responsibility for yourself. You ain't a child. Get what needs to be done. I'm a lazy dogfucker all I wanna do is inhale herbs and chill out all day and night. But seriously if your tired of feeling down all the time make shit happen. I kicked myself out a my mom's basement cause I was abusing her love. Feeling like you got no energy to do anything? Eat healthy and hit the gym and exercise it will rejuvenate you in the long run. Physical and mental go hand in hand a shitty workout is better than nothing cause it's about maintaining healthy habits. Get a puppy to care for made me happier