The guy is a perfectionist and probably thinks nobody is able to meet his standards, both of his games are doomed if he stays a solo dev IMO.
I dont think having a team means a faster development, see, one of the developers that delivers the biggest amount of content is Dr. Pinkcake, hes a solo developer. Ocean also releases a lot of content, even more considering hes producing 2 games at the same time. Now take Oppai Man's example (Fresh Women developer), he has a team working for him, at this point we can say they are a company, yet their updates has small amount of content and cant match Ocean or Dr. Pinkcake update size...i remember they even downgraded their renders with A.I some time ago...and they have people working and make a lot of money.
About being burned out, having a team doesnt means this will not happen, each member has their own work to do and it can still happen, i know they can hire someone else but the quality of the work can change and having more people brings some work-relationship problems, ppl in this field tend to not be the best ones to work with.
I personally think that Ocean and Pinkcake being solo developers is what gives their games the chance of reaching the end, because they seem to have the drive to finish it, i would add Nyx (Intertwined) to this mix too.