That's an interesting rant topic. There're many factors for quality mods. You can't just expect there are always quality mods to use. Also, I think it's nothing wrong with inexperienced modders. People put their time to modify their games and share the content, if you don't like it it's fine, but I think it's a weird attitude to rant about other people personal works that are not up to standard. Maybe you can try to make the quality one for you . The quality ones definitely take someone, or group a lot of their time, and who is gonna do this. Also, the experienced modders are used to be inexperience modders
I personally think positive about new generation of gta5 modders in the future, and encourage them to make more, and improve