This article is a soup of concepts. And the worst part: most of them are not contradictory at all.
Nothing matters as in there is no purpose given to us from above is true (at least according to Nietzsche). That means we have the option of inventing our own purpose. Or not - it's still good to enjoy life as is.
I've read hope is fucked some long time ago. It touches the stoicism with: don't get too invested in things outside of your control, it's not good for you. Yes, but Mark forgets that living like this is not pleasant at all. But having the skill of acceptance is good as we're not omnipotent, so there are things we can't do anything about.
That brings me to manifesting (ugh). We all know we won't get everything by wishing hard. It's still good to try and by thinking about positive result we have better probability of figuring out a plan and sustaining motivation to see the plan through.
Next we move on to terrible people listening to philosophy. Yes, they can do that and it doesn't take away from the teachings. And no, e.g. stoicism has a strong moral component which they are purposefully ignoring.
Also, to respond to title directly: accepting your life is shitty and understanding it doesn't take away from your character doesn't mean not trying to improve your situation. Yes, it means feeling good if your attempts fail. You still have the option of trying again.
I give the article author massive props for being honest with themselves. But no, books cannot save you. Only you perhaps can, but you might fail. And that's ok.
To end positively, I agree with the call to action. And the article is a nice historical overview.