I'm an idiot and got distracted mid series, and came back for the last four episodes. I know I liked it originally, but after coming back, I felt like nothing made sense.
Did I forget the plot? I don't think so. There was a lot of character development going on, and things like that. I sat and watched for like ten minutes while they talked about why X character let X character get kidnapped, and how it was because he secretly resented him, and that's why he wasn't on guard enough. But I'm just like "You...were in the other room. Please, just shut up."
Yes, I couldn't wait for everyone to shut up and actually fight. Of the last 4 episodes, maybe 1 is actual magic and fighting. The animation is good, but none of it really made sense to me, magic wise. Maybe important details were skipped, but I felt like there were a ton of plot holes.

All of the character's movements just felt like they were doing whatever random thing they wanted. It's a chaos of tons of actors, while the main characters monologue about their growth and how they're just weak and pitiful human beings and feel sorry for themselves.
You could say that's realistic, because it's how real life operates. A bunch of people make a bunch of moves for a bunch of random goals. It just feels endlessly irritating when the main character is just chilling, being attacked, spied on, and stolen from by all these characters with these arbitrary goals- and he's just chilling. The fight where he deals with it isn't for two more episodes, we've got to monologue until then.

Honestly, maybe it missed the impact because of the break, but I remember the details for this anime pretty clearly, so I don't think so.

If you like character development, and people talking, this is for you. I like people talking, but only when it's interesting. When they stop the fight to start monologuing, at least make it good, you know? "Oh, I'm not really strong, I'm just borrowing people's power." Please, shut up. That's what a necromancer is. I don't care about your introspection about how you're actually weak, finish the fight first, please.
Also, the fight made no sense to me. Honestly, it was just a bunch of flashing circles and the main character finally deciding to get over himself and actually use his main strength. There wasn't particularly any logic or intrigue to it, in my opinion.

There were multiple scenes that touched my peeve, which is main characters being overpowered but having absolutely no sensory abilities of note when the author wants something to be surprising.
Okay. I firmly remember characters present having sensory abilities, and should have known X was approaching or X happened, but we're just going to pretend they can't now. I had a break, and I remember this, so why doesn't the author?

It's just my personal opinion, but if you think you're a strong character, and you have no sensory abilities, you're worthless. If people can do stuff right under your nose, what do you even have power for? "I'm going to protect my friends!" The only thing protecting them is plot armor, all you can do is get revenge, honestly. You have nothing and no ability to protect, because you can't even tell what's going on in your own home. Personally, that and the constant talking and emotional introspect were enough to ruin the ending of this anime for me.

As a final note, I really hate the trope of "Oh, I'm not going to talk to you or reason things out, so our two parties will fight. But now that I've lost the fight we can be peaceful and understand each other." Just talk, you bastards. If they'd talked about the origin of their powers, and the things they did, and their goals, I would've been 10x more interested in that negotiation than 5 main characters feeling sorry for themselves for 40 minutes.

In my opinion, good premise, poor execution. Maybe you'll get more love from it than I, who paused half way, or maybe you'll have different taste. Just, do your best to ignore the author's brain lapses.