Hopefully this helps without being rude.
Try using less effects. Like, a lot less. A lot of the good videos I've seen have no distortion and are really clear. Lots of people prefer to see videos with clear footage and less effects. If you don't already know, try using more effects that go deep into the video instead of messing with it. An example would be ViTiek's "Fly like me". He didn't tamper much with effects. Most of the effects that tampered with the video didn't move, such as the frost on the screen, therefore not messing with the video at all. Another great effect that he happened to use/learn was the smoke effect. It looked nice and added a little realism into it.
Next chance you get with a video that has madmans in it, try making bloodsplats that slowly evaporate off of the screen.
And as for real life or Gaming videos, don't use many effects. If you want the video to be serious, simply use slow motion and a slight flash for the shooting when it comes to FPS videos. Not too long or bright. Keep working on it until it looks right. And the real life videos are where it gets hard. When it comes to videos like those, they normally look good with green screen. If you want to make a real life video without having to get a green screen, just add slight effects in the background. That and slow motion.
The art community is harsh. It's something we all have to deal with. And sadly, there are just some mean ass people on this that are able to help, and hurt your feelings in the making. In the end, you need to read past the negatives and look deep inside for the positives. The improvement also depends on you. Look at another editors style. Learn it, interpret it, edit it, and improve it until it looks like you've made your own style, leaving their style in the dust. In the world, people copy and improve stuff all the time. An example would XBOX360 and the Wii. The Wii had come up with little people that you could act as throughout few of their games. Microsoft liked that idea. So they took it, improved it, and now few people are playing Wii's (Not that people generally liked the Wii much from the start).
Keep trying. Improve and prosper my friend.