I give up against Malenia

Just fought her in NG+ and I give up. Used mimic for NG after an hour of trying but wanted to try to beat her solo. So, I started NG+ and went to her again. After 6-7 hours of fighting her, I just give up, guess I can't git gud. Closest I got was 35% of phase 2 but then she used her phantom attacks and died, Tried again for another 2 hours and couldn't get to that point again. So, I just summoned my tiche +10 to skip phase 1 and let her die before I started attacking in phase 2 which would leave her around the same HP as that attempt. Then I finished her off. Tiche did ended up getting a waterfowl dance for me, so I don't feel as good, but I'll take a half win (per se). Didn't even struggle against Radagon/Elden Beast this much, took me less than 10 tries, but Malenia is just a completely different beast. Not sure if I'll continue playing this game, Malenia is such a bs boss imo so it left a sour taste in my mouth. Maybe I'll play again in a few months.