Do DOS1 and DOS2 look like a mobile game to you? If BG3 will "look like a mobile game", then that's because the team wants it to look that way. You either like it or don't. Early builds of DAO looked like NWN, which came out in 2002.
I don't know how "THEY thought something looked shitty" would imply anything about whether it actually IS, or WILL BE, "shitty" or not. To me getting anything lower than an A in a math exam back in college was shitty.