Sisyphusian 

Of being compared to the torture of Sisyphus.

I'm tired of this sisyphusian lifestyle. I'm not pushing that boulder up the mountain again.

Sisyphusian by GoddM September 13, 2021

Sisyphusing 

When you are working really hard at something and getting nowhere

I took this girl out, bought her dinner, and talked her up 3 times and got no booty, I am really Sisyphusing it

Sisyphusing by Uphill ice skater March 10, 2022