My bugbear isn’t really a trend, it’s been around for years - three quarter length sleeves. I’ve got long arms, and the bottoms of the sleeves often sit in the bend of my elbow, can’t tell you how often I’ve tried something on and not bought it because of this, it’s so uncomfortable when I bend my arms.
Also don’t like the big, clumpy boots with really thick soles that are so popular. I’m a size six and a half/seven, and they make my feet look like the proverbial boats.
And I agree with the extra long false nails and extra thick eyelashes. There’s a lovely looking young woman works in my local Boots, and you can barely see her actual eyes through her lashes, it looks ever so daft imo. Plus, they would annoy the hell out of me.