Those are just nicknames people use because the real names are long and boring.

“Fannie Mae” is actually the Federal National Mortgage Association (aka FNMA). “Freddie Mac” is actually the Federal Home Loan Mortgage Corporation.

Capitalism is no more based on “infinite growth” than human psychology is based on “infinite pleasure”.

Capitalism, like humans in general, is perfectly capable of surviving through extended periods in which the future will be worse than the past.

For example, the Japanese economy has been stagnant for a couple of decades, but Japan is still capitalist.