It's cool that you let it all out as it exists within you Raul, that's an 'honesty' point, now you can take it one step further to develop self honesty about it. I also find looking at dreams as useful ways to open up things that had been 'hidden' within me where whatever I am experiencing as 'others' is in fact entirely myself and the judgments, ideas, beliefs, expectations or perceptions I've created about others or something/someone. Therefore however we react in our dreams is in fact ourselves as well and can be a way to open up things that in your case you've been holding on to your mother as all of these emotional experiences that you've defined in relation to or towards her, which in fact don't define 'her' as a person, but it entirely defines you and are showing you who you have accepted and allowed yourself to become as that hatred, as that emotional experience 'towards' another which is then entirely created by yourself.
The way to walk through this is through opening all of these memories in detail, to self forgive each one, to go one by one seeing where your responsibility exists to self-forgive the reactions you've had towards her, and in doing so realizing that as much as you can extend forgiveness 'towards another,' the real self-honesty forgiveness that exists is only towards yourself, because you're the only one that's able to change who you are in relation to this. So, this is also why walking the DIP Process is the way to walk through these memories, patterns, personalities we've become within a particular structure that assists you in learning how to start opening up these points up and also, as we have previously suggested, starting in DIP Lite which will give you also the foundation on how to apply the tools in a more detailed way.
Otherwise you can continue learning from how many others have shared processes of walking through similar experiences too, but one thing is certain, it will take dedication to go opening these points up and actually will yourself to self-forgive you and consequently change your relationship towards her, regardless of her being in your life currently or not. I also wrote a blog recently on 'reconciliation' and how I have been applying/living this word in my reality too https://marlenvargasdelrazo.wordpress.c ... ciliation/
So, share back how it goes for you in opening these things up further, whenever you feel that you're not yet empty, settled, stable and aware of your responsibility to this point you are opening up/writing about to change, it means there is more to uncover, and that usually means yes getting to see the things we would prefer to keep 'unseen' or 'hidden' or covered up as you said, because in a way we are ashamed of what we've become, of what we've done and experienced within ourselves.
For that, I suggest please checking out these very important and supportive audios that have been recently released on eqafe. com
Facing and Forgiving Real Shame (Part 1) - Demons in the Afterlife
Facing and Forgiving Real Shame (Part 2) - Demons in the Afterlife