Are you expecting sweet berries, but the strawberries seem to laugh at you, giving you a sour taste?
It's all because you're overfeeding it with nitrogen.
Yes, that same manure you're throwing around like crazy turns the berries into chameleons - they turn red on the outside but stay green and bitter on the inside. Use ash instead.

Sprinkle it under the bushes once every two weeks - potassium will make the berries sweet as honey.
And now the shocker: strawberries hate fresh straw. You think that mulch protects against rot, but slugs breed under it, which eat the berries at night.
Replace the straw with pine needles - their spines will scare away pests, and the aroma will enhance the taste of the fruit. And never trim the tendrils with scissors! Tear them off with your hands so as not to damage the core of the bush.
But the strangest life hack is… sugar syrup. Spray it on flowering bushes (1 teaspoon per liter of water). Bees will flock to the smell, pollinate more flowers, and the harvest will double.
Just don't overdo it, or you'll end up with a hornet's nest instead of strawberries.