You’re not alone. I don’t like that they changed the interface/layout/background art and I liked the old profiles, clans and custom campaigns. Sure ladder had some issues with matchmaking but nothing that couldn’t be tweaked or upgraded over time. What makes it worse though is that they removed these features without even having replacements ready. These features never should have been removed in the first place. Nearly 7 months after the game released and we’re still waiting for them.
If you want nostalgia or something more classic you’re better off looking into installing an older version of the game before 1.32. You won’t have Battle.net but you’ll have Single Player and LAN. 1.26 is the last original version (before the classic team took over to update it for Reforged), but 1.27 is pretty much the same with some compatibility updates.