Firstly, I’m really sorry you are going through this OP, it is really shitty behaviour of him.
I’m by no means anti-porn, and I’ll often chime in when a partner says they don’t want there DP watching it, but when it is excessive, like in your scenario and replaces real life intimacy then it becomes a real issue.
most men watch porn, not all , but the vast majority. However, watching porn as frequently as your DP is not normal, and even daily in a healthy relationship is unusual.
He is gas lighting you and it appears quite coercive behaviour from him.
As a 40 year old man, I can honestly say I would never ever replace porn with real sex. Not in a million years. If he is willing to do that, then the problem absolutely is not you, it’s him.
This might be a first for me but….
LTB!