As a person who has not read the manga, my review is solely based on the anime.
I watched this show very late, considering it's 2018. Jokes, memes and negative comments on this show are everywhere these days, but I still decided to give the show a try. To be honest, the show was actually entertaining to watch most of the way. The problem's that it was seriously flawed all throughout and those flaws led to anti-climatic deaths and a very poor ending. Among the flaws, the biggest of them all were the characters.
1. The show's titled Akame ga Kill, and Akame's the poster girl for it. For some people (like me), they even may have been drawn to watch the show because it would center around Akame. Instead we get Tatsumi, a generic male protagonist. This was fine honestly, I thought we'd still get some major development for Akame throughout the series. Instead, she was downgraded to a generic cold-blooded killer that we've seen in so many anime. While, they touch up on her backstory, I didn't get to truly feel her personal struggles since they focused too much on Tatsumi. There were even times where she hardly appears in an episode. Basically, there was a lot of potential for Akame as a character, but we got a bland assassin instead.
2. The deaths were anti-climatic because the anime didn't develop the characters properly as well as poor pacing of the story. To avoid spoilers, I can't give a concrete example, but a simple one should suffice. One of the characters was briefly introduced in the first few episodes, and they brought in his/her backstory a few episodes later. Just as I was getting settled in with his/her backstory, they kill her on the very next episode. Bravo.
3. The final fight was well made, but I couldn't really feel the "epicness" going on because once again, poor characters. The two fighters never really had a direct conflict against each other. It's like they just fought in the last episode for the sake that they're good vs evil and for the sake that it's the last episode. The same could be said with most of the fights throughout the show. Though I felt Tatsumi's despair over the state of the capital in his fight against a certain Imperial Arm in episode 23, his opponent responded by being a stupid generic villain and just fired b e a m s all over without listening to what he said.
A lot of more examples could be given but I would like to avoid spoiling the show. (tho I did slightly spoil it)
If you like the shallow shows with "dark themes that makes it looks badass even though it's just edgy" and decent action, then I recommend that you give this show a try.