My first question is "why did you return the Eotech?"

If it was due to it "just not feeling right" or just blurry, you might have an astigmatism in your eye. If that's the case, try one of prismatic sights. I have a couple of the Burris versions and really like them. I'm sure the Vortex and Leupold versions are good too.

Maybe worth a look, if that's the problem.