There are WAY too many problems in this world to express why life [seems to] suck, and most of them we may not even have a clue that it's happening or not! And if we did know, we: aren't gonna do anything or will enforce the problem…
For example: perpetual shrinkflation, war, circle of violence, murders, felonies that endanger others' lives, rich and/or influential people manipulating others, climate change, isolation, the mental and emotional annihilation the Internet is continually doing, hurtful stereotypes, cyberbullying, etc etc etc etc...