The last criticism of Technical Analysis is known as the Random walk Theory.
This is very easy.
They claim that prices are serially independent and, as such, they are random, meaning unpredictable.
Yes, unpredictable.
Can you believe that?

Moreover, they employ the efficient market hypothesis that states that prices fluctuate up and down the intrinsic value in a random and unpredictable manner, and the best trading strategy to use is the “buy and hold”.
In simple words, what they really suggest by randomness and unpredictability is that there are no trends in the market.
The best answer here is to pull up any price chart and identify the trend.
With just a little knowledge, anyone can identify the presence of the trend.
Remember, before you invest in the markets, invest in yourself.