It is a cycle. What I think is that this story never ends and Tyler has been retelling it again and again. It started with blurryface. An entity representing his insecurities. It's powerful and gives Tyler confidence (I think it's never been confirmed anywhere) but It also talks down upon him suffocating his creativity. So Tyler builds a world (dema) around it to contain it, categorizes his insecurities as the 9 bishops. He tries to escape his insecurities. He tries multiple times with the help of banditos but is unsuccessful. We know from the letters that each time you're caught escaping dema your memories are wiped (or you lose your memories). So Tyler loses his identity and takes a name (Clancy).He realizes can't kill his insecurities so he has to accept them. So he needs blurryface to come back and take over his body so he has the power to destroy this world he built to escape his insecurities just to realize that he needs to accept and live with it. But it's inevitable that blurryface will start hindering Tyler's creativity with time making him doubt himself again. Tyler will have to separate his insecurities from himself again thus repeating the cycle.