About Inter, I agree they have achieved in Millenium years, Inter got 5 scudetto in the row, 2005 until 2010. that great achievement. But Milan, only 2003–04, 2010–11. and Juventus is the king of decades, got 9 scudetto in the row between 2011 until 2020. I hope so with Napoli and Roma. so far Napoli is just great in the Maradona era, while Roma in Francisco Totti era in 2000. but for this session, Napoli and Roma will be difficult to beat Inter and Milan on top when they don't build the team in January.
AC Milan fight for Scudetto with Juventus very tight in many seasons. Inter Milan only were able to won 5 Scudetto after Calciopoli and Juventus struggled to get their power back. Roma won only one Scudetto but they had some amazing run with AC Milan but failed because of amazing performance from Shevchenko and Kaka, failed against Inter Milan because of Mourinho and Ibrahimovic. The domination of Juventus in 9 seasons are very impressive because Serie A is more competitive than Ligue 1.
Napoli are the best in clubs you mentioned. They did not win any Scudetto since the era of Maradona. Even when Higuain had an amazing season with about 30 goals for Napoli in Serie A, they failed the race with Juventus.
I watched just a few those matches, including that of Roma draw against Sampdoria and about that I can say Roma should have won the game, they were goal hungry in the game and pushed with every possession, they were rather just unlucky to have conceded the goal not too long after how hard it took them to get the goal initially.
Roma have to work so hard and need luck from themselves and opponents as well to go far in this season. It is best if they can end this season in top 4 and join Champions League next season. It will give more motivation for star players to join Roma in summer transfer. However, I am doubtful that they can achieve this.