Care to be more specific? "Regulations bad" is a pretty common platitude around here but you've stated your main thesis, here, without a hint of support to back it.
My observation is that the glut of available private credit has meant for at least 15 years you could just raise funds from those markets, and that's the ultimate reason IPOs have become less common.
This hasn't made it "impossible" for companies to go public. It just eliminated the need. If you can raise billions of dollars in a G round why go to the public markets at all?