Bangkok or Thailand?

To be honest, I don't know the tiny details of what is happening is Thailand. But what is within my knowledge is that the opposition, led by The Democrats is trying their best to oust the current Prime Minister, Ms. Yingluck Shinawatra. This happens when she and the government which everyone are well known of, is that they are pro Thaksin, former Prime Minister who is accused of wrongdoings during his premiership, is seems trying to bring back the former leader by pushing for an amnesty approval.

That gives a chance for the opposition to start their rally and demonstrations, which I believe they are very good at. Some protesters even commented that "Thailand has enough and they want a new leader".

Ok. So here comes the part where I do not understand about. So, if Thailand wants a new leader, why when Ms. Yingluck dissolved the parliament and called for a new election, the Democrats, which is the largest opposition backed down and boycotted the race? If some of you did not know, there are 2 times if I am not mistaken that a pro-Thaksin government was toppled, and took over by military. But every after election, let see who won... hermm, oh, it's them again! 

The Government has their stronghold outside Bangkok, they won not with small majority, they won big. So what may I ask now is that, is it really what the people of Thailand wanted, or is it only what the people on the street wanted? Why don't you just let the majority decide, not the people on the street. It is not helping the country at all.