Some things will never change with Garmin

You know that and bought it nevertheless…

I would contact the seller and ask for an exchange. But the devices might be out of stock at the moment, seems to be a great demand…This is annoying of course

Sorry, but I can't understand which is the problem

OP doesn't like the feel of the buttons.

You have been around a long time and have seen people having issues with buttons. I am not going to spend time arguing 

The buttons feel like they are ready to fall off the watch. Other people mention it in another forum you hear two clicks, once when pressed and another one just before the button returns to its initial position, some of the buttons of the watch feel totally different 

I know what you mean. If one (or more ) buttons doesn’t have the same feeling/behavior as the other buttons, that is annoying for a new and 1k €/$ watch. Especially if it is a new watch!

Are all the buttons 'squishy' and lacking any mechanical click? On past watches (usually forerunners to be fair though), some people complained of just one or maybe two buttons going off after some time, but not all of them from brand new.  If they are all off on your brand new epix, then you really should take it back to the vendor for an exchange or refund (even though it sucks having to give up that gorgeous screen for a while).  If there is a click that is the same on all buttons, then perhaps that's just the way they are supposed to be and other people's feel of two clicks may not seem the same to you (everyone's different after all).

I'm now noticing the same after just receiving the watch today.  This is concerning.