At a much lower standard I did the same thing, swapping tennis for golf around age 15.
After numerous beatings at tennis individually (but good team success) I loved the advantages of golf over tennis:
a) you could compete and win from day one against much better players b) you could practice much more easily and enjoyably on your own c) it was much more social - during play and after in the clubhouse d) there were much more exciting intra club competitions - weekly junior medal, frequent knockout tournaments etc
Interesting. And doesn't that about sum it up? Kids put off tennis because they're being pressured to give up school, even before GCSEs, which is the exact wrong thing to advise them in every possible way.
I could never take to golf - for me, if you don't run, get sweaty and out of breath, it ain't sport (tennis doubles falls foul for the same reason).
But I think golf is very well structured and set up here in the UK. And interesting to hear that you had a similar reaction, Born2Win.