Looked in the code, almost every single file has gothboy in it, lol. Here's server.cs's first three lines for example:
//-----------------------------------------//
//-RTB Server Support : Modifed By Gothboy-//
//----------------------------------------//
Every single .cs file his this in there. Why? What's the point? Remove every single one of these and you could have a much much smaller file size.
And the name. WTF? GRTB. Gothboy's Return To Blockland. Why? How about "Modified Return To Blockland" or anything? I don't recall Ephi's name being everywhere in the addon, so why should yours be, goth?
Not to mention the guis look horribly disorganized, I'm sorry but this is true. Don't you wonder why people are giving you a hard time, goth? Obviously there's something wrong with your addon.
This image:
The blockhead icons look terrible. Like a 12 year old did it in 20 seconds.
Why does the addon have an rtbinfo.txt? And a namecheck? Why did you add an extra colorset? If we want your colorset we could download it ourselves, thank you.
Also, this logo:
It looks great but it's still bad. If you removed "Gothboy's" from there, to make it "G - RTB Modified RTB" then it would look perfect! Hell, just keep the GRTB but remove references to you then I'd bet it would be alright.