Keeping going and pushing?

Is it worth the effort to simply keep pushing and keep going in a world that is pitted against us?  I feel like the more I try to get ahead or push forwards in life the more it takes out of me.  I try to never give up but there must come a point where keeping going simply isn’t worth the effort. Maybe just getting by is all I have left within myself. What really is the point/reason of and for life? We are pitted against a ‘machine’ that just keeps rolling and rolling. It churns away taking our time and our life up.  We reach retirement with our best years gone. For what end!  I’m tired.