Anyone who does understand how the system works would know that so many major pieces of legislation in such a small time was actually a very rapid pace. In fact, I challenge you to find another legislative session in recent history that was more productive with substantive bills.
Your argument shows that it's actually you who doesn't understand how the system works. It is the system as a whole that didn't have time, not just Obama. It's not like you can just have a congressman submit a bill and then you vote on it.
1. That bill has to be drafted, first and foremost.
2. Then it has to go to each of the relevant committees and subcommittees, of which there are often several, all of which have only so much time in each session to do this kind of work. At this point the relevant subcommittees look at the bill, consult research and expert opinion on it, etc, etc. This can also take awhile.
3. The overall committee takes the bill for markup. This is a process of negotiation that can take weeks or even months for major bills.
4. Then the bill goes to the relevant chamber as a whole, where the same process of negotiation, amendments, etc, takes place again. This can also take weeks or even months for major bills.
5. While this is happening the other chamber has to do all the same things and the timetable works on the slowest chamber. (and the Senate has various procedures that can delay the uptake of a bill by weeks simply due to the minority not wanting it to pass)
6. After both pass a bill you have a conference committee, which is yet another period of amendments, negotiations, etc, etc.
7. Then it's back to each chamber yet again for more voting and more delay.
All of these steps are extremely time consuming and take huge amounts of input from large numbers of legislators and staffers. There is certainly no "magical" limit as to how many bills can pass in a session, but there is a very obvious practical limit as to how many can.
Worthless bills don't get that kind of work because there's no need to have a conference committee about renaming a post office. Major tax legislation, major economic rescue packages, financial overhauls, and health care overhauls all take a TON of work. Anyone who thinks Congress and the White House had all this extra time to pass whatever piece of legislation they wanted passed are deluding themselves.
None of that even addresses the feasibility of passing such legislation.