So far only 2 teams have never been defeated Al-Hilal and Al-Nassr well, it is likely that competition will occur between these two teams like last season it's just that we haven't seen anything impressive from Al-Nassr because out of 5 matches they only won 3 times while Al-Hilal won all the matches by scoring 16 goals.
Al-Hilal and Al-Nassr have always competed for the title in the last few seasons, although in the end Al-Hilal always managed to beat Al-Nassr in the title race. I see that this season, it is likely that both clubs will continue to compete tightly to win the league title this season. Therefore, it is worth waiting for who will be the winner between Al-Hilal and Al-Nassr at the end of the season.
I wouldn't call what is happening there now competition because there is no competition there. Al Hilal have dominated the Saudi Arabia Legue the same way PSG have dominated the French Lig 1. Last season they prevailed against all the clubs and this season they are already going unbeaten while the supposed challenger, Al Nassr are not even in the second position in the table. Therefore, I did not see any competition in the SPL this season and in the few seasons to come unless there is some remarkable changes in the clubs.
Yes it is true that the Saudi league is becoming one sided, only one team wins the title every season the rest are not able to win. As Al-Hilal are equally strong in all aspects, no team can match them, which is why they play aggressively against any team in the field. Among the other clubs in Saudi Arabia, Al-Nassr and Al-Ittihad tried their best but finished second or third every season. However, they could never keep pace with Al-Hilal in the title race, which led to Al-Hilal dominating their opponents to win the title every season. As the Saudi club owners are spending a lot of money on players, they should buy more quality players and build a strong team to compete with Al-Hilal.