A Rank Party wo Ridatsu Shita Ore wa, Moto Oshiego Tachi to Meikyuu Shinbu wo Mezasu nu none raws https://ncode.syosetu.com/n5495gn/121/ Synopsis 「I can do it!」 Yuke, the scarlet mage, left the A-ranked party 『Thunderpike』 that he had been with for 5 years. He had finally run out of patience with his life as an adventurer, being ridiculed as a servant and a money-grubber. When Yuke is looking for a new party, Marina, one of his former students, appears in front of him. Then, Yuke joins a fledgling party of all girls. His abilities are revealed in the Labyrinth conquest immediately afterwards.His abilities are revealed in the labyrinth attack that follows. In fact, the magic and skills that Yuk possesses are of a higher level than the standard! On the other hand, Thunderpike, having lost his strong support, is in a state of trouble with failed requests and new members leaving. They are in a hurry to get Yuke back to the party, and they are planning to set a sneaky trap! An adventure fantasy story with a 「leave type」 protagonist, not an 「banished type」 protagonist,
Looking at the first chapter, seem to be : Mc is a support member of the party Because of that he is not the focus of their attention in combat Since they do not pay a much attention to his actions, they undervalue his contributions Since they undervalue his contributions they have been stiffing him on rewards and underpaying him They justify it by saying he is not pulling his weight and only doing things anyone can do He gets fed up and leaves. I am guessing that they start to fail as they now have huge holes in their actions they did not even know were there. Been done, but it keeps being done as this is a set up that strikes a cord with anyone who feels underappreciated in their work place, or who hates their credit stealing boss that takes the glory and rewards for others hard work. Of course the initial setup is not what matters, but at least it looks to not be expulsion, and more MC getting fed up and leaving on his own.
If you want to drum up interest in a novel, use an English title. That is my advice as an owner of a translation website