The more I get through Paul's various letters, the more i feel that Christianity could fairly be called "Paulism". Anyone else feel the same?

This of course is the standard liberal view that has gone out of date now in scholarship. It is based on the assumption that Christianity was a western religion rather than a Jewish one. Paul of course was the one with the intellect to see that Jesus was the Messiah in fulfilment of the Jewish scriptures and the intellect to put this down. Unless you grasp the fact that he is writing from the point of view of second temple Judaism you will not see this. Paul’s working out of Jesus’ teaching is quite clear - he is the Messiah in fulfilment of the Jewish scriptures in which he had been steep since birth. He was a ‘Hebrew of the Hebrews’ hence in a unique position to make clear just how those scriptures had been fulfilled. Unfortunately German scholarship with its antisemitism made Paul out to be some form of anti-Semite which is of course the most ludicrous charge one could have brought. What you are saying is based on your own total misunderstanding of Paul and the purpose of the gospel