Thick Beanie in 90+ degree weather that clashes loudly with a suit that you shouldn't be pairing with any beanie in the first place. 
Suit either poorly fitted or not tailored to fit at all.
Ultra Casual suede loafers that also clash loudly
Buttoned up bottom button 
Best of all, Tim has this look that betrays that in his own he's absolutely slaying it with this look. I'd put money on a bet that the suit is probably from some over hyped designer brand (likely Armani because ...... Tim).
I wouldn't slam on a regular bro for any of these faux pas (except the beanie) when you see them at the one event in their year that requires a suit, but I'll slam the guy who promotes 'high value male' bullshit for fastening the bottom button.
Now I'm trying to decide if the ignorance is willful or not, because I could absolutely picture Tim being advised and brushing it off because he's a rebel.