It's a tough question to answer because to be certain of that answer would require running a sadistic experiment, in which two identical countries would be subject to very different treatments.
One thing is sure. Without government support, widespread support, there would have been tremendous amounts of economic and social distress, even if we are talking only about all the small business owners who would have had to put the key under the mat and close down business, let alone all these millions of individuals who would have found themselves unemployed, facing bankruptcy. There would certainly have been a high cost to no government intervention or much smaller government intervention, not only in terms of dollar costs but also in terms of the tremendous social costs.
That's why it's difficult to comment precisely on whether it would have been worse or not that bad to have less intervention or no government intervention at all. It certainly would have led to a very high amount of fiscal, financial and social distress.