i agree with what you say
they are very inconsistent but for different reasons
- Inter has always been like this, a team with inconsistent results, it hasn't changed
- Milan, has had a poor transfer campaign and has a lot of injured and unfit players
Yup, Inter's inconsistent appearance has been shown since the start of the season. Lucky for them, now they are on the 2nd.
The lack of transfers made by Milan was predictable, because Milan was still under financial control. And the new Milan owners also don't want to spend a lot of money to buy new players.
if you look back, in history

also in the past it was like this
when Inter had Ronaldo, the super champion who had to do everything by himself
managed to lose against Bari, but like for 2-3 years in a row he lost both at home and away against Bari, which was certainly not who knows what team power
therefore these inconsistencies have always been there