Obviously one of the most important factors in these shows is the main protagonist. Everything centers around them, after all. Harem genre in general, unfortunately, does not have much variety in what main characters they could have. Very rarely you have protagonists like Keima, who is on a class of his own, or Shidou, who's at least likeable despite being incredibly generic just because he's not an annoying piece of shit that causes more problems for himself than everything else in the show. And then you have Issei. This protagonist just happens to be one of the obnoxious protagonists you could have in a show, harem or not. Did you ever watch other shows and saw that silly "perverted guy" who always hangs out near the main character and only exists as a brief comic relief? Yeah, that guy is a main protagonist now. Hope you liked those brief comic reliefs, because that's definitely not going to get old after an entire series.
If that wasn't bad enough, he's also "that" guy who happens to have one of the most powerful McGuffins in the series, which makes him suddenly important. Normally this wouldn't be too offensive since it's done by literally every other show, where the protagonist happens to have that special trait that gives him unfair advantage no matter what, but the way this show handles it is just terrible.
You see, the side characters that Rias has under her are supposed to represent what Issei lacks- Outside of them being awfully shallow as characters and merely existing to pander to specific parts of the audience as overdone archetypical tools that are in nearly any JRPG ever, they are supposed to exist to make Issei feel comparatively inferior. In fact, in the last episode, Issei talks about how he lacks the strength, healing ability, magical ability, or swordfighting skills while fighting the obligatory final boss of the season- Does this all matter? No. He has the most powerful weapon shown in the series so far, so why is this relevant? What was the point of making him seem "inferior" to others when all he has to do is do the typical resolve speech and it will make him just instantly more powerful than everyone else?
Let's put that in this context and see if that sounds any less ridiculous:
"I may not have a bamboo stick, boxing gloves, or a first-aid kit, but I have a rifle that I can shoot you with."
No, it still sounds dumb as shit. I also liked that chess analogy that the show kept bringing it up, though. It's almost like it's just there for the sake of being pretentious. And it is.
As for Rias, she's just bland as any other character in this show. She even goes on a speech about how she wants to be seen as Rias/herself and not be carried by her family name and nobility- Huh, that sounds awfully familiar. Oh, that's right- That's every Disney princess speech about how they're so perfect that it's bad. Outside of that, she falls in love with Issei because he's the main character and also because her fiancee conveniently happens to be a pretty huge dick like again, every Disney princess plot. While I'm not looking for super originality here, it's pretty bad if you're ripping off the fucking Disney routine.
Of course, it doesn't help considering the second half of the show involves this Disney princess routine being played out for too many episodes while the first half involves this clearly not evil girl suddenly calling Issei out on a date only to show her true evil nature in the same episode. The asinine pacing can be further shown by how Issei goes on later about how he truly cared about this girl he met for less than a day and how he's sad to realize that she was evil all along. Am I supposed to feel sad here? Later, Issei meets this other random girl, who he also met for less than a day, and later on she gets captured by the aforementioned evil girl, and then she experiences a horrible Disney death on a techno-cross. Good thing Rias can resurrect dead people, so that didn't matter in the end. The great part is that there was supposed to be this time limit about saving her before it was too late, but that turned out to be totally irrelevant too. Way to build tension and break it in the same episode. Trivialize an already inconsequential death of a girl that the MC has met for less than a day is truly the best way to invoke emotions.
As for the other elements of the show, the music is pretty generic, but not painful to listen to. The animation is also incredibly average, which is about what you'd expect from a show of this genre. Though if I had to point out a flaw, it would be that the character designs were just really generic. If you can't give your characters any depth, at least make them look interesting.
Overall, the show is bad. Shallow characters, annoying main character, irrelevant consequences (including how the MC "sacrificed" his arm for a power up, which was completely inconsequential), lack of an actual antagonist with an actual motive, and just overall being boring. It's downright offensive. The pacing was all over the place, and including quarter of the show with fillers is probably the most retarded idea one could come up with.
Frankly, for the longest time, I've been wondering why these harem shows were mostly awful. Maybe it's the overwhelming amount of pandering shoved into my face that is causing me to not enjoy these shows very much. Maybe. But more than likely it's just because they're fucking terrible. I tried to watch this all the way through while ignoring all the pandering so that maybe I could appreciate the hidden depth within. Or the lack thereof.
It didn't turn out well after all. Let's not try that again. And neither should you.
