A smaller, less bold stripe would be great there... Just not that one.
Thanks for all the valuable feedback, gentlemen!
Though now I still have no clue what to do with my bloody Red Square
^ What I was going to say. Also the stripes are a bit wider. In combination, it pushes the shirt more toward the casual spectrum, resulting in some incoherence between it and the suit. I think EliodA did the right thing in trying to make the tie subdued, but it couldn't tone down the overall effect of the fit enough. Compare it with this shirt, for example. (All said with the caveat that I'm still figuring this stuff out myself.)