Which part do you think is trying too hard? I think it looks simple and elegant.

Slim black pant and striped top - the blazer is making it look polished. The French might have been early adapters of the striped Breton but only because stripes are so amazing graphically perfect. You look great!

Simply perfect -- effortlessly stylish. Trying too hard to me means missing the mark or over done. I do not see that here.

Tres chic! I have a French friend who always wears black with understated accessories and fab shoes. You have nailed the look, and on top of that, it's very classic and elegant. There's nothing even remotely OTT about it.