It's not an absolute requirement in the sense that ordination of a man who does not have an academic degree is perfectly valid. Before the Council of Trent, the vast majority of priests did not have degrees (including of course all the priests of the first few centuries of the Church, before universities were invented - universities were originally monasteries).
But in practice you'll probably find that all dioceses and religious orders require a man to have an academic degree (in theology and philosophy) before ordination. Possibly this is even a Canon Law requirement.
The Church doesn't want to ordain priests who are ignorant or poorly trained. That was one of the problems that led to the protestant revolt. But if an otherwise worthy candidate has trouble with academic study, the diocese or order may well make special efforts to coach or ease him through his degree (though without compromising academic standards). e.g. St John Vianney.
If you are saying that you can't or don't want to obtain a degree, no matter how much help you get to help you complete it satisfactorily, perhaps you could consider a vocation as a monk, friar or religious brother? And yes I know that that is a very different vocation to that of a priest.
It's gtreat if you feel God calling you to be a priest. But that is not the only thing necessary. A bishop has to freely choose you to be a priest. It's not just between you and God.