What you are using is NOT the Default WordPress Theme. And it is a very broken theme that needs a lot of fixing.
And the “regular site image” for any website is an image that is UNDER 60K. Even weblogs have huge images that are rarely more than 100K. 800K+ is way, way out of the ball park.
Okay, to your issue. The question has to be asked.
If you set up the comments to be viewed on a page without the blog post, then how will anyone see the post they are commenting on? On the front page? On a single.php
page view and then click to a separate page which contains only the comments?
If there is no post, there is no comments. You want ONLY comments and no posts, then set up a discussion/bulletin/chat board and that will give you dialog with no posts.
We’re just trying to help and understand what it is you need and help you to create that with WordPress. But WordPress isn’t always the tool for every job.