I would say that was a strong influence but there were a lot of custom games with some of the elements of DOTA before it. I think DOTA defined the entire genre and how all the elements work first. Brood War just didn’t even have the options to make a real MOBA.
That’s a game I hadn’t thought of in a long time. I wanted that to be good so badly. It just wasn’t though. Didn’t run well, wasn’t fun. Apparently someone has remade the game with the same name + the overprime. Wonder if they made it any better.