The only source that I saw says 26 episodes, so that is likely all we'll get for about a year until the next season, which tends to start in April. So April 2023 or April 2024 is the likely next season.
As for Wang Ben, it's how the last campaign portrayed things that made it unbearable to watch. Wang Ben was practically dead, against the best Spear wielder, who was even better than he was before, who was at full strength, with Wang Ben an inferior spear wielder, and Wang Ben one hits for the win. That is just full on BS.
With Xin, he oftentimes doesn't win. How many battles in the past did he actually win one on one? He survives, but he doesn't win one on one against a superior opponent. And the thing about Xin is fighting is all he has, well, ok and instincts. He doesn't have tactics. It is a lot more believable and exciting to watch Xin grow.
Wang Ben doesn't grow. He is just superior because he is superior. That's why he is so unwatchable oftentimes.