There are lots of varieties of strawberries, many of which are (like a lot of produce) specifically valued because of how well they'll ship. What they often lack though is taste.
I'm going to guess, however, that since you've had this strawberry patch for a few years you have had good tasting strawberries from this patch in the past.
Berries need enough water of course but they thrive in the warm sun. It the weather there hasn't been sunny or the rain has been sporadic that might effect a tasteless berry. My best berries have been when we've had lots of sunny weather. I believe the warm sunny days help increase the sugar levels in the berries. I've grown Honeoye strawberries mainly here on the farm and these are a particularly tasty variety. But I've had a season or maybe two when the berries were a bit less sweet and I'd chalk that up to the weather those years.
I've heard of folks adding wood ash to bump up the potassium level in the soil. I haven't personally done this makes sense as strawberries do better with a soil rich in potassium.
If you didn't pick all of them you may find that a few more days on the plant might help the flavor.