Video Ads Autoplaying on Homescreen

I wish I had the answer. Video ads are beyond user control. I have contacted Roku twice already to express my opinion about this unwelcome intrusion. I did not sign up for annoying ads that I am forced to sit through until I can use the device that I paid for. I have been using Roku boxes for probably over 20 years. I now have four and will trash them all if this continues.