No. In most areas the legislative branch has delegated their authority to the executive branch, and appointed bureaucrats write the regulations. This is a problem due to lack of accountability. I hope that the Supreme Court will eventually eviscerate the authority of the executive branch to write regulations. If something needs to be regulated then Congress ought to pass a specific law about it, not pass the buck.
How could Congress possibly keep up with all the issues affecting the country? Congress is a serial machine - it can pass < 1 bill at a time. Executive branch agencies are parallel machines.
There is no need for Congress to keep up with all the issues affecting the country. They should only legislate on issues where they have legitimate Constitutional authority without stretching the intended meaning of the commerce clause. Everything else can be left to the several states, or simply not regulated at all.
In particular I hope the Supreme Court will eventually reverse the precedents established in Gonzales v. Raich (2005), United States v. Darby (1941), and United States v. South-Eastern Underwriters (1944). That would essentially destroy much of the federal government as we know it today, and good riddance.
