Last time Oliveira fought Makhachev, he has told that he would fly to UAE 20 days before the fight to pass acclimatization issues, but in 12 days before the fight. Now there were only 10 days lays, he was still in Brazil and sparred without the gear. Imho he could only blame himself or his team for missing that opportunity and no wonder Dana is annoyed.
Yeah, I know, I've seen youtube commentators criticising Oliveira for not getting there earlier and questioning whether he really takes this fight seriously. That injury is 100% on him, although I wouldn't judge him without knowing the details, accidents happen and it's possible to catch an accidental knee, elbow or headbutt even during a soft, touch sparring.
I wonder what's next for him and if he'll get another title shot next, or will they make him fight someone ranked below him. I think Gaethje deserves the next one and Oliveira should fight someone else within the next 2-3 months.