Quite good actually, I really liked this story. For once, the classic "kick out" make sense.
MC is an appraiser and a really good at that. Because he knew what is talent is, he never wants a promotion, so he gives all his credit to his friend Lucius. Lucius became the head of the guild while MC stay a simple employee. The problem was MC help many people to climb up the guild, and at some point these people could recommend him too, and that threatened Lucius job. That why He gets rid of him, the guild is strong enough even without MC anyway.
I like the fact that MC didn't have any combats skills and work outside this field. I'm tired of stories where the MC is [non combats jobs here] and because [everyone his dumb or deus ex machina] MC become OP. Like an appraiser who could copy skills or a farmer who could farm literally everything (food, wine, swords, bomb, ore, money, etc...) Here we have a non-combatant MC who do stuff related to his jobs. The story is about management of guilds, contract with chops and finding talented peoples.
Lucius was more or less a decent manager, at least at first. But the fact that he climb up was only because MC gives him his credits, make him fear MC. He knew MC talent and do everything he could to put sticks in his wheels. But at the same times, his obsession over MC make him take bad decision for his own guild.
- Like when he wants to kill MC's guild by prevent him to obtain raw materials. He absolutely wants the new mineral dungeon. But since the captain of the adventurer is an ex-trainer of MC, he retires him all his archer and healer from his troops. Sabotaging his capacity to take the dungeon from others guilds.
Lucius is arrogant, look down in others and constantly stressed. Because all people MC's trained become ace of the guild, and he became more and more hard to keep them out of powerful post in the guild. The stress in his case is for the worst.
- When a rival guild take a dungeon from him because they have raw materials, that Lucius's guild should have the monopoly. He decides to stop everything until he found who betray him. Turn out the rival guild just buy it from MC new guild, too small to be normally able to produce this much. He assumed no anonymous small guilds could threaten his business and stop his own production 1 month for nothing.
Lucius is known to practice some limit or illegal stuff behind the scene. He made pressure on his own artisans by example. Probably because of a superiority complex.
MC has good and bad points. He is talented as finding and training new talented peoples. But he is too generic, the story could have been much better with an MC with an actual personality.
He is too passive and s*upid in the start. If he wanted to be a trainer and not a manager, he could just refuse the promotion and keep his credits. Even if Lucius become the manager, it will be by himself and not because of MC, no grudge and since MC has already said he stays a trainer, Lucius didn't have to be threatened by him. Also, MC would have been recognized by all. But since he decides it was simpler to gives his credits to Lucius, he stays anonymous and that will put him at risk. That still a problem later since no one trust a nobody.
MC is too OP, yes he is S rank appraiser and A rank trainer, but it's all the information we have about him. And the story will ignore the fact that for trained someone, you need to have knowledge about it first. So for now I see MC trained or has trained a blacksmith, a swordsman, someone who melt metal (English isn't my first language sorry, I don't know the job T.T), a manager, miners, blacksmith specialized on silverware, an archer, a support mage and a healer. That only people I remember, but it's a LOT of different area of expertise. I find it hard to swallow that MC is that knowledgeable.
MC is dense and all the girls fall in love with him, that... sigh wasn't necessary for the story.
There is a character growth. MC was too passive at first and just goes along what happen. But at some point, after the choc of his dismissal passed, he acknowledged Lucius wasn't fair to him and decided to bring him down with his new guild.
I like the fact that some of MC problem come from his own (or friends) behaviors. He knew he can do it, his ex-trainer knew he can do it too, so they're naturally trying to impose their view of things. But others don't know MC power and doesn't want to bet on him. The peoples who opposed MC have all valid reasons to do for once. Like that another appraiser. Yes, he knows MC is better than him since he appraises him, but who will really say "Oh hello new one. So you wish to take my trainer and change their main job to the specific one I already know they suck at since I did try once, nullifying all my years of work with them ? Okay no problem, do whatever you want" Of course not, and either MC or his friend Lillianne help to pass the ointment. MC already know they have special skill who balance their default in the job, but don't bother to explain it. Lillianne just fan-girl and impose it on the name of her one true god, MC. The other appraiser isn't at fault, no one would like to be looked down and destroying years of work for reasons MC don't bother to explain.
Conclusion, I like the story, but I find it's a shame that the MC is too Gary sue.