Last season, these two teams were involved in a fairly tight competition, with both vying for the best. Napoli itself was able to take advantage of the situation because Inter Milan had a greater focus on the Champions League so Napoli took advantage of the situation and managed to achieve the Scudetto, something like this that Inter Milan needs to avoid this season.
I don't think the mistake they made last season will repeat this season again. It was a big mistake they made last season by giving more focus to the Champions League, and in the end, they still were not able to win it. Instead of Inter Milan fully shifting their attention to the Champions League, they should have given equal attention to all competitions. Had they done that, they might have won at least one trophy last season.
With the strategy they used last season, many of their fans were really disappointed in them. The painful part was that, despite all their focus on winning the Champions League, they still went ahead and played poorly. How can a team that gives less attention to other competitions for the sake of the Champions League end up conceding goals without scoring any? It was truly a poor performance from Inter Milan.