Different growing conditions of soil and weather makes difference. I have Alma in 7 gallon pot. The breba fruit on Alma ripened in August and they were good. The main crop is expected to ripen here in zone 5a by the end of September or early October.
Don't discard and give it more chance with more care (watering /fertilizing/pruning/pinching etc..

Thanks ottawan, i'll give it another chance, it gets pampered, i wonder why it's pithy and dry. maybe it needs more fertilizer, i know it gets water, pruned and pinched. I think maybe it needs root pruning when it goes dormant, it's pretty tight in the pot.