Dawnseeker, I understand you think it is a guild members issue.
If I would take myself as an example though, I am good friends with the full top 10 on my server who are in 5 different guilds.
There is a healthy competition there for sure.
However, If one has won 6 CW it is possible that if I face them, they might throw the match also.

I want to say that I don't think that Yue did something wrong.
I find it an example of sportsmanship to let others win after you have won so many.
I think it is better to except that match fixing will happen because we are all friendly with people in this game.
Yue did it in a way that was obvious, but it can be done rather unsuspected too by just removing a rune or 2.
Since we cannot see the formation, it can be easily done without anyone even noticing it.

The problem however is with the betting. Some people feel that they lost out because of it and that a player can inform the guild/server, but not all will know.
For those who bet with gems, I think they have a valid point to be angry since they do represent "real money".
Maybe the betting should only be 1 free bet.
This way the loss you experience is not really a loss, but a gift from Tynon that you could not use to the fullest, but still pays out.
At least in the case discussed it was clear enough after 1 round that he was throwing the match.

It is rather human to feel disadvantaged in my opinion, but it is nicer for yourself if you can change your perspective.
If you have bet gems, it might be good to send in a ticket and see if they do something for you since this was a rather obvious fix.
I hope Ucool will give us a statement on how they will handle this if it happens again.