3/5 means average. It is indeed about average. I'm not saying it's bad. I'm just saying that it's about average. People need to quit being upset all the time just because I don't give a 5/5 rating. Sorry, but 5/5 means "great". Not just "oh, well, there's nothing majorly wrong with it, so 5/5".
I don't hate this icon or anything like that. I gave it a 3/5, that means it is of acceptable quality, pretty much average. It's your icon, and if it looks the way you want it to look, you don't have to change it, but this is the rating I'm giving, and it will stay that way unless it is improved in the future. I'm not demanding you to change it, but a 3/5 is the rating that I am giving it for now, and it's up to you what you do to your own resource.
It's only one rating. I'm sure you'll get plenty of 5/5's from other people who hand them out more easily, and before you know it you won't even care that it ever got a 3/5 mixed in.