pulsaralto thanks for sharing your thoughts, but what @ableman said also makes sense. For every 10 people who enjoy a video, there might be one or two who don't, and it's sometimes not possible to please everyone.
It is, however, ultimately the studio's decision on how they would like to receive feedback. The nature of any type of viewing content is that majority of users who enjoy the content simply watch it without any additional interaction, with some exceptions who leave a nice comment. When it comes to negative feedback, the easiest thing to do is to leave a message.
With that said, please refrain from arguing against the decision. There are always multiple factors and a thought process behind every action taken. Writing an email with constructive feedback is just the matter of copy pasting the link to the video, along with your thoughts on it