Free walking tour Sousse, oltre il percorso turistico

I'm leaving this review with 20+ walking tours behind me, so that other travelers don't fall into the trap we did - planning our entire day around this walking tour, and missing out on the beach because of it. Two stars instead of one because Saber was actually nice and friendly, speaks good English indeed, but the "tour" was like walking with a random local. We were chatting about our personal lives, but we got little to no info about Tunisia, or Sousse. We cut the tour short 1 hour into it, but I was really upset because we didn't get to spend that nice afternoon (with the milder sun) at the beach instead. We believe he does have the potential to be a good tour guide, he just needs to put some preparation and much more effort into it.