Now I will address the main issue raised in the OP:
One of the things to consider when we think about government is its purpose in existing. I mean, why have it at all?
People have studied this for quite some time, and we have written tracts discussing the issue from the Greeks, the Romans, the Chinese, etc., all from more than 2000 years ago. Writers from the 1400’s on were often obsessed with some aspect of the issue, and, of course, Das Kapital is in many ways an exploration of the question.
I think that most people would agree that the reason for having government is because anarchy is less preferable. That is to say, without a government, some things that need to be done to have a society in which we wish to live don’t get done. Thus, the basic principle to distill from this is that government exists to do for society those things society won’t do for itself.
To this notion all brands of philosophy regarding government can attach themselves, from the minimalists (like Libertarians) to the maximalists (extreme socialism, for example). Each can debate WHAT is necessary, but by then you aren’t debating morality, only the price. 
Which brings us back to the thread. If, indeed, the purpose of having a government is to have it do things we wouldn’t do ourselves, it shouldn’t be too surprising that some of the things government does we find unnecessary. Sure, some things government does we can all agree on. No one questions laws making murder illegal. But if government is doing its job, some of what it does will make some of us unhappy, because that is its purpose, doing what we won’t do ourselves.
Most of us find speed limits annoying. We think ourselves capable of driving at higher speeds safely, and dislike the loss of time involved in slower driving. Yet, without a speed limit, we would have people driving at whatever speed they choose, and total chaos would result. In the face of consistent evidence that increased speed causes increasing chance of accident (see, for example, that idiotic race recently between the two basketball stars in Charlotte), some limit seems needed. Government steps in and imposes one. Now, why any specific limit? Well, in many cases the limit represents a compromise between the desire of the populace to unimpeded travel and the conscience of the populace which won’t permit too many accidents. Where that compromise falls will vary from place to place and time to time (see for example the speed limits in Michigan versus Ohio, and, of course, the debate over the national 55 limit). Any change in a limit will make some happy and some upset; many won’t care until it applies to them personally in a given situation.
Which gets us back again to the idea of what government is for, and why we don’t like what it does at times. If government is there to do things we won’t always do ourselves, we will, by nature, find ourselves restrained from doing what we wish. One would hope that the response to this by an individual would be to: a) accept the limitation on personal freedom as a necessary, if irritating at the moment, part of avoiding anarchy, and b) work to make sure that his or her opinion about what government should be doing is included in our great debate process on the issue (voting, speaking to officials, running for office, etc.). More often than not, though, what runs through our mind is: a) I am going to ignore this rule since I don’t see the need for it, and b) I shouldn’t have been punished for breaking the rule cause it’s unfair and I don’t like it, and I’m gonna do all I can to see I don’t get what I deserve for it (see for example, the threads regarding radar tickets and police without lights). One can perhaps understand that it is awfully hard to be thinking of the needs of the many when you have the blinking cherry behind you.
In sum, government exists because no government is not preferable. Government exists therefor to do what you and I won’t by ourselves do. We won’t like everything government does for this very reason. Where government is acting to impose moral choices we don’t agree with, or acts to limit our personal freedom, it becomes hardest to agree that government is not screwing up. 