Question is do you worth my admittance?

Admittance is the most difficult thing I suppose :)

I just don't know who is a fanboy and who isn't.

- Oh, maybe we all are fanboys, to someting, I presume.

Simple truth.

Aaaaand there it is.

The old "everybody who disagrees with me is a fanboy."

I dont need to learn to count, sadly the bandwagon is going forward, no problem.
It's very hard for fanboys to admit though, that the game has a fuck ton of DLC cars which removes balance between vanilla game and the DLC nonsense.

Learn to count.

Here is a list of content available in AC (and actually including a list of things to come):
https://docs.google.com/spreadsheets/d/18AUKAyE-PIvMEMzC407thbdd2U1W46wjKxY3lLdj7Nw/edit#gid=1049137265

So as you can see the base content is already quite a bit more than 15 cars.
Then there are quite a few cars that were added as free content with later updates.

So yes, there are DLCs and with the DLCs it sums up to around 120 cars in total, but it's not like you can't do anything without the DLCs.
Still would recommend most of the DLCs as the variation in cars is just great.
And in this game each car does actually feel differently.

Dude, they just added two free cars for free, plus there are closer to 40 vanilla cars, and this is the third time they've added free content (fourth actually, they added another car for free about a month ago).

Content takes money to produce, they don't have the backing of big companies like MS and Sony (Forza and GT).

DLC has been released extremely reasonably, over last two years. This isn't a game like Forza where they'll be releasing a sequel every year, they plan to support AC until 2020.