It would be grossly unfair the blame the charger when alkaline batteries go bad, regardless of how much money is spent or the quality of the battery. Every battery is unique and even the best fail from time to time.
Alkaline batteries are not designed to be "recharged" and, in fact, are not. They are reconditioned in order to fully use the battery, its chemistry and chemical content.
Note that any alkaline battery that leaks, pops or behaves in anyway out of the ordinary should be disposed of straight away.
That said, this battery charger works extremely well with all the types of rechargeable batteries it was designed for. The individual monitors for each battery give a clear indication of charge and weakened batteries (those that have been charged too many times and are due to be replaced).