If this references smack-talking an Angel, it's talk. Still, **** taking an angel takes some massive balls.
No im as such referencing how SD kept the entire arena up though force of will alone.
And sheltered the entire audience from Gaze's aura bolt attack without apperent efford.
Honestly. This is a little like that old tale with the Monkey King and Budha.
Where just like the Monkey King, the majority of participants were to blind so see what went on.

Not to mention, this whole battle royale was done, to stop Gogagog's rigging the game.

To summarize: What David knows is that Gog-agog, a Demiurge, has infiltrated someone in the ring and is rigging matches. Rules of the ring normally are if you are out of field, you surrender or you die. He merely changed the format to PUBG and declared victors in accordance with old rules. He went out of his way to offer anyone formally disqualified, due to rules change, either consolation prize or another strike at him, at the penalty of death.

It's completely rational thing to do under the circumstances. He suspects Alisson is Agog's agent but doesn't mean Alisson is the only agent. This way they either submit or they die.
As i understood. The rule of the ring was you lose if your either knocked out of the ring, or surrender.
But because it seemed like Gog Agog was up to something he made it a FFA.

And i dont think this surprise round has anything to do with Allison or Gog Agog?
Likely what he stated was the pure truth. That as such it was a little unfair for White Chain to have to fight him after emerging from a brutal FFA.
So now he shows off some of his moves as compensation.