Right now, I think a bigger problem for you (although yes, a cluttered appearance is a turnoff to readers, generally speaking) is that with all this stuff on your site, it's slowing down your page load time which can negatively impact SEO results.
Your ads on each post are, frankly, a turnoff. If you've obligated yourself to put them on each post, why not place them in the sidebar?
Your "subscribe" - really the biggest eye-catching piece of color on the page - isn't working as a link for me.
Here's what I'd do.
- Start mentally with a blank slate. Think about what your targeted readers are looking for.
- Create a layout for your site. Think in terms of resources you can offer your readers, pages, logical groupings, etc.
- Do some reading at sites like bigbrandsystem.com (Pamela Wilson's blog design site) and other blog design & marketing sites. Since you're running ads, I'm assuming you want to make some money here, so website/content marketing is DEFINITELY a worthwhile topic for your time.
- Make a punchlist. Review your site as if you were a critic coming to your site for the first time. Write down everything that can be tweaked, improved, or removed to better effect.
- Once you know what content you want to put on the site, work your design around that. You may find a theme that better suits your needs than the one you're currently using. Or you may find it's just a question of cleaning things out and making sure things work.
- If that punchlist is huge, you may want to consider hiring someone to help you out. Or you might be able to tackle ityourself, in smallish bites.
Good luck! As always, this is just my two cents. Your mileage may vary, etc.