Wow. Classic example of a three pattern match that "should" work, but doesn't. You even had the high contrast, relatively dark tie concept working in your favour.
I think the problem is that the colors are too well matched, The base color of the tie and the over-check on the sc are just too close in hue and tone to keep the patterns from clashing..
A navy or black tie with a woven pattern in between the shirt stripe scale and the sc plaid scale would make this an outstanding outfit despite the lack of contrast between sc and trousers. I recommend a black tie. Navy would brighten it a bit and even a bitter chocolate woven pattern tie would work with brown shoes.
Just an opinion not based on science.