I haven't met you before on here so welcome.
1. Over-saturated. This can be a hard one to judge if you're not on a color calibrated monitor. Or the monitor is too dark or bright. It can also be your monitor shows color a bit muted thus many others are seeing the image over-saturated.
2. Your exif data is not on the photo, but it looks like you used a very shallow depth of field. The mid-body area is in focus, the rest gets soft. Need a higher aperture number to increase depth of field so that the entire front to back of its body is in focus. You can get away with the entire body not in focus, but you NEED those eyes in focus. We are naturally drawn to eyes.
3. Consider changing where you are shooting the subject from. I don't know what the environment was, but if you could have gotten around to the other side, gotten lower, and maybe captured the mantis coming over the top of the flower and you looking/shooting up into its eyes... that would look spectacular. Again, I know that may not have been possible and the mantis may have not been that patient. A great rule to follow, when able, is to walk around your subject because you may find a better angle.
4. As a general rule, we don't put the subject smack in the middle of a shot. Look up and study the rule of thirds for composing your photo. It doesn't mean we can't put things in the middle, but knowing when and why is a big part of photography.
Don't take this as a verbal beat down. Photography is an endless journey without a destination - constantly learning!
Here is a quick edit I did with the composition available to me. I brought down the saturation, reduced the darkness of the shadow on its body, and cropped out the dead space from the right side getting its body along the third lines.
Hope this feedback helps.
PS. Someone is going to come along and tell you to post up the exif data (shooting setup: shutter speed, ISO, aperture, lens) you might want to add it.
