This one is a 5/10, it's average, it's a generic OP MC with bland characteristic and dense when it comes to harem.
First, the first episode is really a bad start, I really hate it when the future plot or spoiler is right at the beginning, it kills the vibe for me.
Second, the MC is boring. I wouldn't mind the generic trope to be honest, but it would be great if the MC have more personality, for example he could've been more greedy and scumbag when it comes to money to align more with his poor slum background. Yes, he does punch the ex party leader in the face and ask for money when it comes to healing, but his attitude doesn't really reflect that much, his tone always the same "cool and mature" making the series feels so flat. What I'm trying to say is that he doesn't feel human or relatable to me.
Third is the plot, well it failed because of the OP MC, desperate situation is easily solved under a minute, so there's no weight in it. It would've been great if the MC have to improvise his healing magic depends on the situation rather than brute forcing it with the same shit. The golem fight is nice to see where he regained his old technique traits used when he's in the former party, but that's all it.