Yes, you are correct.
Overall there is no champion but I still wonder if Hyundai is the regular season winner since they did ranked all the teams.
Yes, the wording was ambiguous.
The way I see it, there's no regular season winner, the competition was cancelled. KOVO ranked teams after 5 rounds in order to pay them proper share and prepare ground for the upcoming rookie draft and tryout (It's highly unlikely that this event will take place on schedule, Prague is in a state of emergency).
Hyundai will now face certain post season disadvantages (in salary cap, draft and tryout) without any real prize. Source
For what it's worth, this article states that "Hyundai is the top team in regular season, but not regular season winner".