I've tried it on the lower difficulty and have gotten to half health on the Angel, but from what I understand by reading the comments here there's a second phase after this first one. I think the main problem for me is there's just too much going on for me to process. I've enjoyed the game so far it's just this fight that has me completely stuck. I'm honestly fine with waiting for a potential update in the future with a "story only" difficulty. I'm just taking a break from trying to get past the angel right now, it feels like I'm just hitting a brick wall currently so I'll take a break for now and try again later.