I think it's because boaster said 'the level of Madrid was low' and there was a video saying he would have beaten all the Madrid teams, which is just disrespectful in itself. Also, there have been many excuses as to why they lost to KC, and I'll link some of them below:https://www.youtube.com/watch?v=-nNXwJJS-TU&list=LL&index=2
https://www.youtube.com/watch?v=bhgGhFiCEkU&list=LL&index=5

Literally here that they said they would have beaten both th and navi, they just got 'unlucky'
https://www.youtube.com/watch?v=KwmbltzkJHQ&list=LL&index=6

not to mention that tweet made by the coaching staff, which just adds fuel to the fire, regardless if its true or not
https://twitter.com/CoJoPM/status/1775980547875000577