Interesting, I hope MC steadily gets stronger instead of becoming OP in a few chapters.
Also I liked that beginning the MC is treat very well despite being weak and even has a friend, no "I was betrayed by classmates / king and swore revenge, I'm so edgy yadda yadda".
Edit: Sorry but I dropped this story. (SPOILER BELOW)
We learn about the goddess past and how she almost got humanity wiped out by siding with demons and having her first follower go insane and kill almost every hero (until he got killed), she's very selfish and would've screwed MC's mind too if not for his OP mind skill.
Even after knowing all that MC still decided to free her which is a problem already, but the bigger issue is that she desires to free her friends who probably are thirstying for revenge after being imprisoned for a long time and MC's stupid decision will probably plunge the world in war again and cause human deaths.
Also she lies and keeps hiding information from MC and only after white mage confronted him that she decided to reveal the story (and she's probably hidding some details as well). She's not trustyworthy and relies on reading MC's mind and trying to manipulate him all the time so he doesn't question further her reasons, but MC is stupid enough to follow her anyway.