Big CEXs are killing the original bitcoin spirit by forcing users to pay tax on gains, freezing user's assets, preventing users from using their service depending on their IP and more.
There is a more manipulation scene that exists in exchanges where they will liquidate your positions by either freezing the accounts temporarily or moving the market in the direction to hit the stop losses.
Unfortunately we have very few good CEXs which have more liquidity and those CEX exchanges are taking advantage of this and making a lot of money by manipulations.