Hello,
I have a different opinion. 1/160 sec at 85mm isn't that slow for this type of shot. It is fast enough to capture people walking towards you. And I doubt that they were speed walking. 😊
However, I do think the camera missed the focus on the people and instead focused more on the background. The background is a little sharper than they are.
All in all, I would suggest the lens is the main problem. Did you use the kit lens that came with the camera? The kit lens combo isn't always that good and can indeed give results like this. I've had this experience myself, and as a result, can often recognise the result that it gives.
Also, in all the samples you provided, the 'look' of the photo is the same, which indicates to me the quality of the lens.
This may or may not be a factor, but do consider the lens. If it is a lens that came with the camera, take a look at 3rd party lenses from Tamron, Sigma, and Tokina, for example.
... View more