Full name: Shin no Nakama ja Nai to Yuusha no Party o Oidasareta node, Henkyou de Slow Life Suru Koto ni Shimashita
"Red was once a member of the Hero's party, a powerful group destined to save the world from the evil forces of Taraxon, the Raging Demon Lord. That is, until one of his comrades kicked him out. Hoping to live the easy life on the frontier, Red's new goal is to open an apothecary. However, keeping the secret of his former life may not be as simple as he thinks. Especially when the beautiful Rit, an adventurer from his past, shows up and asks to move in with him!" -Yen Press
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This is quite a standard fantasy series (not isekai), but it's standard mostly in good, not bad. It has some trope elements, like getting kicked out of his original group despite being competent and trying to his best (I guess that's the lightest variation of the "betrayed by comrades" trope). Fortunately it at least fits the destiny based world. Since the MC is seemingly not edgy or emo about it (no revenge plot), it doesn't feel like a particularly corny backstory. It's almost refreshing that since his god-given profession is not suitable for grand deeds, he doesn't fight back with full shounen mentality, but instead decides to ace a smaller dream.
Still, this is a fantasy series and the dude does have a background he's trying to hide, so it would be a miracle if he gained the perfect slow life.
This is quite a pleasant series, so I'll try to keep watching.