Other smartphones have issues too, but in comparison with Fairphone 2, they can’t be easily repaired by the customer. I agree that not having spare parts in stock is a problem, but the reason is that they have to satisfy their resellers demands first. You can get the phone at T-Mobile Austria (in the stores even without contract) and on vireo.de (they also sell the spare parts).
PS.: You can visit the Austrian Fairphoners at our booth at Südwind Straßenfest in May an have a look at the FP2. 