I know I've already commented, but I feel like you're getting a hard time here OP.
I've seen many, many threads here where the OP has said her partner doesn't want to give her oral sex and she isn't sure if she can live without it.
The responses have treated oral sex like it is important and for many people crucial and something they couldn't spend a lifetime without...
I couldn't care less about oral, but I do know that if I couldn't have doggy style sex I would never feel total sexual satisfaction again. I would be unfulfilled for the rest of my life.
I think people are seeing it as "just a position" and that isn't entirely accurate, at least for me.
He is quite comfortable prioritising what he wants and accepting you performing oral sex, whilst it sounds like he is winding down his efforts to proactively please you as the relationship progresses.
Unfortunately sometimes people pretend to enjoy certain things in the beginning of the relationship and its not very honest because once they feel like they "have you", they reveal their true desires and you have kind of been duped into thinking you are sexually compatible.
Again, I absolutely think everyone has a right to change their mind and not enjoy certain things. But it is strange to me that people are acting like you want to force him into it.
It sounds to me like you went from lightly dominant varied sex, to him wanting to lay there whilst you take charge, perform oral and do all the work on top.
That to me would be a deal breaker.
We all deserve sexually fulfilling lives and whilst compromises exist in every relationship, this seems like you are/would be compromising all the things that bring you the most pleasure whilst he gets to shape things into his perfect situation.