Lol yeah that sounds like most isekai manga nowadays so I’ll fill in some details that I can remember.
The mc is constantly told he is useless by his classmates for having no attack class, except for one girl that tries to help. The class eventually abandons/kicks out the mc (in a forest, I think) and he gets saved/picked up by this guild who recognizes his worth. His production skill tree is massive and he can master all production/alchemy/blacksmith skills. Eventually he meets his old classmates and with the girl and guilds help, overcomes the trauma inflicted on him.
The last bit I remember is there is this demon girl who accidentally broke her family’s heirloom weapon (a spear) and is trying to get it repaired without her mother finding out. She seeks out the guild because only a level 9 or 10 blacksmith/alchemist? (I can’t remember) can fix it and she hear rumors that the guild recently got someone like that, the mc. He does repair it and the demon girl thinks she’s in the clear, but her mother, who is either the demon king or their subordinate, can tell it was repaired and brings her daughter and the maid/guard/servant, who helps her daughter, to the guild to find the one responsible for repairing it.
That’s about all I can really remember. I don’t think it’s been updated for years maybe, but if anyone can tell me what it’s called I’d really appreciate it. Thank you everyone who’s read this in advance. 😁

https://www.mangaupdates.com/series.html?id=183756

Wow that was quick 😲 Thank you so much!