I have bought an Android phone and I couldn’t even change the font used or use an ad blocker on the browser it comes with. It comes with advertisements on the h

I have bought an Android phone and I couldn’t even change the font used or use an ad blocker on the browser it comes with. It comes with advertisements on the home screen and if I disable them half of the system functions stop working. Seems it’s not open at all. Sent it back the next week. </rant>