You can ask about it from anyone from here.

Your responses indicate you're not actually reading the links I posted. But fine, let's ask a Finnish police officer if we should trust the police:

According to the blog, the Helsinki police have assaulted suspects in numerous ways, including pushing them down the stairs. The author highlights the blatantly racist and sexist attitudes prevalent in the police force and accuses officers of using steroids and engaging in sexual harassment.

One post details how officers competed with each other to see who could reach the furthest distance when flinging homeless alcoholics out of police cars while transporting them to shelters at night.

The blog also points out how officers were far more likely to exhibit aggressive or violent behaviour towards suspects with a foreign background. The author criticises the fact that suspected criminal activity on the part of an officer is investigated by the police itself and calls for greater transparency.

Comparison to American police is a pretty low bar. Public surveys are measures of propaganda initiatives, and indicate successful reality distortion, not reality.