all the players do battles , but only top 3 clans get rewards. Thats unfair.
at least top 6 or top 5 should get rewards? no medals but rewards? and rest who do 200+ wins should some kind of tokens or gold box or something interesting?

All players does battle but that doesn't mean they're all gonna end up on what they desire. Of course you got to work for it like what the other top 3 clans does. The reason why they're keeping up on that same spot is that they have the overused items and that's what makes them reaching the top. If you go take a look at the player ranking lists, what will show up are players mostly consisting of the top 1 - 3 ( maybe even 4 ) and they have 200, 300, 400, even 800 wins and only consists of 30 or 50 loses.

Although, I do agree that there should be at least rewards for the lower places. Not as big as what the top 3 clans receive but not too low also.

Also, 200 wins can be easily achieved by clans if they work it out but I guess it could be even lower. Maybe this could replace the # of wins milestones from clans which was by the way the rewards were a certain amount of battle credits per certain amount of wins ( 100, 200, 500, and so on ). Take it like this:

100 wins - 6 Mix Item Box
300,500 wins - x3 1,500 Power Kits
750,1k wins - x1 10,000 Power Kit
1,350,1700 wins - 2 silver boxes
2k wins - 1 Participant Clan Medal, 2 silver boxes

That's my thought so on this concept.