Anyone else really struggle with summer wardrobe?

[SugarPlumpFairyCakes]

Every year, I look at my wardrobe and know I'm going to look shit. I'm 6ft tall and it all looks uncomfortable and fits badly and I don't know where to look for decent stuff that doesn't a fortune.

https://www.arket.com/en-gb/product/oversized-shirt-dress-white-1224874006/
basic things like this? oversized shirt dresses and smock dresses?

It's very nice but it makes me look massive. Like a huge sail wafting down the street.