Makes no sense to assume Inter lost serie a trophy just to focus on UCL because all of trophies are important. Winning more trophies are increasing their credibility, but when they bottled it. They get bantered by all of people.
I think it's all about their inconsistency in the performance. If we're watching their gameplay in teh last games. that's pretty obvious about how they always up and down.
You are right, for a team with the potential to win the title, there is no reason to focus on just one competition. Inter should have maximized the game schedule in the last 3 Serie-A matches to secure the title. I think the draw that Inter got against Lazio was the deciding result that they missed. If Inter had won that match, maybe Napoli would not be the champion. Well, in the end, let's just say this is an unlucky season for Inter in Serie-A.