Dear Oak Tree - the 'feeling' is an interpretation of your reality - is it actually your reality? Unlikely that you are trapped by anything more than your thoughts and feelings about it. (hugs)
So what ET's teachings might provide is clarity & integrity in the thoughts about the feeling and the situation.
Absolutely expectation and reality may be at odds and need some reconciliation. But is the reality something you actually want to continue to experience?
Look at the three different ways you've experienced the reality, and the way you've expressed the experiences -
I find him too aggressive and angry.
It feels like everything I do is wrong.
There is no peace in this living situation.
This is a kind of mismatch of logic.
The first - I find him too aggressive and angry - there's obviously a distance between your expectations of his behaviour and his actual behaviour - reconciliation and honesty required - what's yours is yours (expectation) what's his is his (personality expressions). It might be helpful to find out if he's aware of his expressions impact on you - is that what he intends / means to express?
The second - It feels like everything I do is wrong - one cannot argue with what you are feeling, but one can ask if it's an accurate interpretation feeding into the experience. Are you doing 'everything wrong?' or just not to his way of doing them? Negotiation may illuminate if reconciliation is possible - with both of you maintaining your dignity and value in and to the relationship.
The third - There is no peace in this living situation - is this true? Is this fair, is this honest? If so, and changing that is not an option then acceptance would be out of the question, the only sane response would be to say, ooops, sorry, I made a mis-take - and remove your self from the situation.
I really like Neale Donald Walsch's wisdom on these issues - if the current form of relationship does not serve both of you, and your higher selves, then we can only change, suffer or remove ourselves from it with love - not making an enemy out of the other, that's ego at work. Love does so with gratitude and generosity - if a 'mistake' thank you for the opportunity to see who I am not, and find my balance and harmony again, if an over-reaction - thank you for niggling the sensitive parts of me that I mistakenly believe to define who I am, and who you are, and realise that I am not that, and neither are you.
If it is an abusive situation leaving earlier rather than later is always the best response. The only thing worse than bemoaning staying in an abusive situation for three weeks, is staying in it for three weeks and one day.
So be honest - about both the reality and the expectations. Get clear on which is which. Make loving decisions - not selfless or selfish, but harmonious loving decisions and be honest, open, frank and authentic, both with yourself and with your partner.
I think it's interesting also that you mentioned that he was once an 'ex' boyfriend - was there a reason for that?