@Alpha_Salsa
Basically every Isekai has that same plotline. Either lets go for the Demon kings castle instantly after gathering the members or something thats more popular lately about the Heros life after they killed the "demon king/lord" right away. Like Yuusha Goikkou no Kaerimichi, Retired heroes and all these other with terribly long names that are a better comparision, but i cant remember.
This one starts as the latter, but then goes right back to the 1st. It goes for the sad angle with no real build up and has a female elf protagonist instead. Thats the only real difference for me.
For me its a basic isekai/reincarnationi/adventure story just here the protagonist doesnt have to die and reincarnate to have that 2nd adventure, because they live long enough. They still the same op and all knowing here, but an emotional cripple which isnt exactly race specific.
That would be ok, if the battles werent so poorly done, but the demon arc made it clear its one sided with dumb villians and a terrible magic system. I would have prolly enjoyed it more, if it was a simple magic teacher/student slice of life with a more fleshed out magic system.