Hello vijoyal & ab83 =)
I just recently really started to tinker with Waze. Your both right, the roads are a mess, and a lot more wazers are needed. Since your posts however, Im sure the community has grown. I think in order for more users to adopt waze in our region a lot of work has to be done by our local community to fix and update the maps here.
Currently Im updating practically everything I drive through these days.
As for the tools, since were in Kuwait we have to use the "World" server, when your waze client asks choose world.
To edit the maps visit: https://world.waze.com/editor/
Notice the user guide button on the middle left, you cant miss it.. its huge, make sure you watch all the videos. Not doing so, will probably result in more horrible map edits.
As you start off you can only edit within a 1 mile radius of your drive routes, but thats good enough, trust me =)
If you get stuck with anything let me know, and I'll try to help out. (If something is locked for example, but you need to edit it. I might be able to unlock or edit that part for you)
I hope you havent given up on Waze yet.