I would say there is not a lot wrong with the content of your photos, but the development and scanning looks a bit ropey to me.

Unless you have an attachment to 'real' B&W film, you could try out Kodak BW400CN or Ilford XP2 Super, both are black and white films, but process as colour (C41) films. They are both contrasty and high resolution, and as they process as C41, any lab can process them, and the process is fixed, not really open to interpretation, so there is less to go wrong.