What you said could is correct but my own point of view as to why Nigerians are angry and also frustrated is a a result of majorly the governmental and economical system if this two should be properly put in the right places a whole lot of difference would be made
Because first, life it's self is about buying and selling so if the Nigerian currency is diminishing in value nothing would actually work out, you may say let's go back to our own raw materials but you still need proper finance and education to be able to succeed in whatever you wish to do so I personally think if that balance could be made, not only a lot of lives would be saved and change but Nigeria it self would be a better country, peace.
Bad governance is just the problem of Nigerians, why should Nigerians not be sad when it is so difficult for them to afford good living. No money to invest in our skill that can generate good amount of money. The government is not even trying effort to make things better. Graduates are coming out from school but their is nowhere to find job . Living is the major problem of most Nigerians , if government can make Living very easy I think it will put smiles om the face of many Nigerians..