So, the first comment on this anime that gave it a rating of 1, first of all i want to say is that the review made sense, specifically about how they are recycling characters and power scaling.
However, at first i thought of it the same way due to the way it started off. Although as i watched it, it started becoming interesting and actually makes sense. The jokes are half great and half boring, the fighting scenes however are the really well animated and overall, the animation is really good.
If i were to rate the 6 categories, then first goes is story.
1. I like the world building about Robots and mechanics everywhere due to the present day time. I'd give it an 8/10.
2. The art is pretty good and solid, and its really unique, 8/10.
3. The sound is great as well, not much to say but great voice actors. 10/10.
4. Character wise, well, it is true the characters are recycled especially Happy. It's obvious they just put him there possibly because they couldn't think of a new mascot. Same with Shiki and Rebecca, although not as bad. 4/10.
5. The show was generally uninteresting at first, but as the story progressed it became more interesting and the fights were perfect. 8/10.
6. Overall, the show is very interesting and could get better if given more time, if i were to fix it, i'd just get creative and create characters that aren't so similar, if the pacing was faster, it would be even better. 10/10.
I don't understand why it has a 6.76, i hope it at least get to 7.20 because it has potential to be better. So the anime is just great, just needs a little working of creativity and not just recycling of characters from FairyTail.