DP Kuurth is strong enough to shatter the bones of Juggernaut. This is enough to seriously damage Thanos.
But this is FP Kuurth, who is insanely more strong.
Then we have Kuurth's healing ability (instant).
Then we have Kuurth's unstoppable hammer (which can kill Thanos in one shot).
Either this is a stalemate or Kuurth wins.