Because they're terrible. The government is corrupt.
Did you know rural Chinese women have the highest rate or suicide? They're stuck in a cycle of poverty because their husbands go to the city to make money and leave them behind. The government makes no effort to fix this.
Did you know China has a rapidly increasing AIDs epidemic? The government has a program where you can sell your blood to the government for money. Many poor families resort to this so they can feed their familes. Unfortunately, the needles they use are not sterile and transfer AIDs. When an activist revealed their huge scandal, the government tried covering it up. When she was to receive an award for her work, they put her under house arrest.
The government is corrupt. Most of their elections in small towns and large ones are corrupt. The politicians bribe and people accept them. The polls are twisted and they get what they want.
Thousands of orphans. China has a rule where each couple can only have one child, a boy. If they have a girl ,they're allowed to keep trying until they have a girl. Because many families don't want ot care for their daughters, thousands of girls find themselves on the steps of orphanages already way in over their heads. They also abandon disabled or 'defective' children because they want that one child they have to be perfect. Thousands of children are orphaned, and most of the orphanages are in poor condition. Many places deliberately kill or starve the children just to get rid of them faster.
They're greedy. Those dog-food, baby formula, toothpaste, monk-fish poisonings? China. They're poorly organized and care too much about money, over safety.
That's why I dislike the Chinese government, not that actual people. I am half Chinese.