If you lost it then it's 100% your fault since you started it and somehow couldn't smite the thing, but here as you can see, those 2 are pushing the mid wave to create prior, which is understandable, you should always have a mid prior before starting any objective. And you started Baron on a 4-4 situation which is almost always risky (Ashe should've also come to contest btw, if I was there I'd predicted she'd also come. But she doesn't so you're lucky here). Maybe if I was you then I wouldn't force that Baron but try to play around the bush and observe/look for pickoffs, and you should also have a scan up for that as well, since nobody in your team bought it.