Because there is a huge gap in the story after defeating Zhaitan and season 2. When new players defeat Zhaitan they are given a 2 minutes video of season 1 and then thrown into season 2 with totally different characters. I convinced a few of my FFXIV friends to try out GW2. They got hooked into the world but after defeating Zhaitan they immediately felt disconnected when they started season 2. They started asking me 'Who the hell are these new characters'? They couldn't get attached to those characters no matter how much they tried. The story also took a major nosedive in season 2 compared to the Zhaitan story. So all of them left and went back to FFXIV. And I 100% agree with them. How the hell Anet thought it would be a good idea to throw new level 80 characters into season 2 with unknown NPCs and they all act like they know each other for years. Its like watching season 1 of Vikings, skipping season 2 and starting season 3. Sad... very sad.
Its not about me. I am an old player. Its about my friends and other new players. All of them lose interest in GW2 after defeating Zhaitan because of the reasons I listed above.
