Everything was going south, starting with the appearance of the Primal.
Dealing with the Volcano God would have been a hassle, but it wasn't impossible. Michael was certain to defeat the Volcano God with the support of the three God Curses. He almost had the Volcano God where he wanted him to be when the Primal appeared.
If he only had a few minutes longer, Michael would have had defeated the Volcano God and disappeared. The fissure in the fabric of space and reality wouldn't be able to block him and the Primal would have appeared in an empty planetary system.
Unfortunately, his plan didn't work out as intended. Nothing worked out like he wanted to. The worst about that was the danger level of the Primal. Michael knew he wouldn't be able to defeat the Primal, who showed him that quite clearly.