I don't want to be mean, but it sounds like either your game is somehow bugged or there is some serious skill issue. However if you beat blasphemous, then you can't be that bad.
Edit:
Aaaaam, yeah...you needed to pay attention when the game told you that arrow magic is good at hitting weak spots.
If you hit the body:
View attachment 4760016
if you hit the face:
View attachment 4760022
The charge attack can be stopped with a single arrow:
View attachment 4760036
You can hold the up directional button before you press the arrow button to immediately aim and shoot up btw.
(I have the staff of hardship equiped which resets your stats to 1, 1, 1. Even with 0 upgrades this bossfight is beatable by just spamming up arraow.)