The tai chi system is built upon certain key precepts and these must exist if your class is teaching real tai chi.
If these qualities are missing, then you are not even learning tai chi - regardless of how much you like the class.
Tai chi is not about popularity. It is not about who taught who. It is a martial art and has very clear guidelines for practice.
Not everyone cares for the degree of work required of a martial artist.
When many people start tai chi they imagine that it is an easy option; no work required yet wonderful results.
Life is not like this.