Would you be upset since you just purchased the M8?
People have been saying this since the original Galaxy Note came out. At the time, most industry commenters expected the Note to fail spectacularly, but it, and its successors, were a massive commercial success.
Whilst I have an M8, it isn't my primary phone - that's a Galaxy Note 3. So, my M8 is my secondary device!
I don't care if people say it's "too big" because for my purposes I don't find that to be the case at all - and I don't have overly large hands and find the Note 3 perfectly pocketable.
The point is that we all have different needs and requirements.