Revolution - Carina challenge
So I've attempted to do the challenge this week and since I didn't have ghulk as a 5 star or a 6 star I did the challenge with 2 Korg and 2 Thor ragnarok thinking that if you needed all champs they probably would have give them in other challenges like the doc oc one. I was surprised when I didn't receive the rewards after using a lot of items in the quest.
So since I never got the rng to get a ghulk, I will never be able to complete the challenge and I've been playing over 5 years with 179 5 star champ and 99 6 star. This doesn't make any sense with all other challenges where when you require a specific champ they are given in another quest like doc oc or Loki, kamala in previous challenge.
Why would we be penalized for using less champ than what's proposed? Anyone else feel this doesn't make sense with the purpose of these challenges?