Honestly I don't think a book is going to help you; you have already found what you already need and that need is in the fact That structure or whatever that event was that shattered your life isn't meant for you.
It means you obeyed too many rules that were pre-determined and preset and it gesticulated your whole perception.
The event that happened to you Can be seen from two perspectives as the book that you stated either down or up..!
But that's not the point the point is the answer you're seeking in a book isn't going to tell you what it is.
the answer you're seeking in a book is going to give you tools and utilizations of how to interpret them but it isn't the answer itself.
the answer is within yourself now if there is some factors which are Hampering you psychologically socially or physically or from a clinical perspective then help should be seeked in that regard, but if it's more of a representation of what to do now well, to deter future Encroachments of the world so your point of you doesn't get shattered upon then that requires some alternative structure..!
This structure is what in how a lot of people commenting on Peterson is on regalia People who have a sort of structure a.k.a. a religion have the necessary papers to make a claim or a right it is not about being absolute or not. Right or wrong it doesn't matter to them but the structure that it gives to them allows them to muddle and fuddle through life a little less.
So the question you need to ask yourself is what structure will you have for yourself it could be praising a rock for all it matters or it could be having hope into a greater universe ultimately it is structure and foundation of coming to grasp of knowing that you are part of something bigger when that is acknowledged a lot of your burdens will dissipate your burdens will not shift nor relinquish but slow down.
Now if you're under the age of 30 then Jordan Peterson is something that would give you the initial understanding of what a structure is. in order to build up upon it in order for you to unwind the brainwash that you've done to yourself that would be a great start.
arguing whether he believes in God or not is irrelevant I personally have been listening to him for nine years the transformation and morphisn of watching a person become so Entangled Trying to express what emotion that he really would want to put forth has been extremely beneficial. It shows you don't have to be an expert to have flaws or you don't need to be perfect to not have them.

Ultimately this boils down to Which direction is best for you to seek. Stoicism is great but we live in a world where even stoics faulter..!

What most people don't realize about stoicism is it could be best implemented in from a position of power not a position of weakness and that is the key of being a true stoic or not.

But the world I has a nuanced harmonic balancer that it creates a pendulum of whatever grief that has been brought on to whatever entity for it to come back fiftyfold.

That is Dharma.

There is the old saying among these QiQong practitioners in china apparently:
"That I can cure you of any maladies aches disease or pain even your karma but the one thing I cannot address is how to fix your dharma"