Premarket activity is a sign of manipulation

So, I have done my research to pick the right moment to enter a trade, studies the market and earnings. Everything went well. The stock gone up for IBM after the announcement. I am waiting to get some return on my money spent on this stock as a trader.

But then comes the premarket activity.
The stock has gone down premarket, from $287 to $262.

Made me lose trust in this US stock market as a whole.

What a stupid example of manipulation and corruption. Favouring some people or organisations (legally with rules, but still favouring) over the rest of individuals.

What is the difference between USA and China ?

All manipulating and corruption but in different methods. Each one seeing the other corrupt.

To me, both as rotten and corrupt as each other.