When does life get better?

(NSFW just in case)

I 20M have been in a bit of a mood slump I've been getting mad quickly and sad even faster, I can't seem to find a happy spot.

Life has been really crazy for me lately after my grandfathers unexpected passing, it has been a slow but steady decline in terms of mental health.

is there something I'm missing? something i can do? does anyone out there have any advice for me?