This series is one in the large wave of Konosuba rip-offs that emerged after the drastic success of that series. Unfortunately, it doesn't really seem that the author of 'Level up by Eating' had any actual plans for a story or characters, simply the motivation to make something to make money.

My issue with the series largely came down to the characters. The MC is completely uninteresting. His personality is template-typical, and he does nothing new or innovative other than become op by eating things and amassing skills. It does the 'skill collection' trope just like many other series have done, but it doesn't take the time nor the energy it needs to do anything satisfying or new with it. Most everything is forgotten shortly after use.

I may have just grown too old or too senile, but the female lead may even be worse than the MC. She is just an idiot character, which can be amazingly done, but that's really all she is. She doesn't seem even the slightest bit deeper than that.

As a really short ending note, I can't imagine anyone actually liking the comedy in this series. It's juvenile and cringeworthy.

I suggest this series if you want to read something that will feel like a waste of time.