It's a very aggressive phrase steeped in internet culture, basically calling someone a really pathetic loser in life. Sometimes its used ironically for making a mundane situation seem more provocative. Recommend not using it in real life

I've never heard that phrase - - it sounds incorrect, or possibly new slang.

Could also be used to express how the current coping mechanisms aren't working as effectively as one would have imagined they should. For instance, "If only I could find other ways that can help me cope harder"

It's not a common expression. I think someone is just making a creative way to say, "try harder to cope." (Cope means to deal with difficulties.)