And it’s not only design but the ux is horrible too, when you switch between conversation - it does not focus on the chat box field so you can start typing right away, instead you have to click it first. This is a basic stuff for a chatting app and whoever missed that is apparently clueless about ux
Edit: also if any of Skype iOS app developers is reading this - on iPhone X when you accidentally click top left corner of the phone where the clock is - for some inexplicable reason the whole conversation scrolls all the way to the top, which is incredibly annoying!