The thing is, they did as well as could realistically be expected dealing with Clingan/Williams on the offensive glass/lobs and Avdija on drives/free throws and still lost.
It's going to be a colossal struggle to win a single game with 20ish minutes (more, if Kornet's in foul trouble) of non NBA caliber C play (have to dust off the corpse of Plumlee and maybe Olynyk for spot minutes) vs Clingan/Williams on the offensive glass/lobs and Avdija on drives/free throws, which is why not hanging on in game 2 was so massive.
Give the multi day break from 2 to 3 and the short turnaround from 3 to 4, they need to go all in to get 3. Do that and get Wembanyama back by 5, they should be fine. If neither happens, this series is over.