Winning creates a winning mentality. Milan are a prime example and how the won serie A with a fairly average side. They built momentum in the second half of the prior season and carried it forward. In the same period we lost all of our under Sarri and never recovered.
When you are on a poor run it is very hard to stop the rot. You need a bit of luck or quality, something to get a win and try to build something. Salernitana could have been it.
Either way we need something to change and I can't see what it could be other than changing coach or Chiesa/Pogba returning to lift the team.