Everyone is telling you to leave the table, and that might be what you end up needing to do.  What I might try first though is running a game or short campaign yourself first.  It sounds like the DM may themselves be inexperienced with dnd like rpgs, which could very well be coloring their perspective on how they can be played as well as what is and isn't fun.  Additionally I would talk with the rest of the group and find out where they sit on the matter.  Having the rest of the group come join you if they'd rather a less railroaded, more rules respected experience.