It looks like the plant is lacking in nutrients, in this case most likely nitrogen, but a balance of nutrients as well. Raised beds, even with the right amount of water, will eventually flush out all the nutrients. Nutrients need to be replaced on a regular basis. Every week or ten days water with a liquid plant food. Early in the season when you want vine growth use a plant food with a higher nitrogen content (25-10-10 or close to that). As the plants begin to reproduce, switch over to a plant food with higher P and K content (8-25-25 or in that range). That fertilizer is called Bloom Booster or something like that. P and K will promote blossoming and fruit production. Nitrogen will promote green plant growth. Nitrogen late in the year will produce big bushy green plants but at the expense of flowers and fruit.
Short answer: your tomatoes are starving, give them some food. The water to nutrient ratio is out of whack. Cut back on the water to the equivalent of about an inch per week; perhaps 2L every two days is OK, but every third or fourth time add plant food.
I am not opposed to commercial plant food that can be dissolved in water but there are plant foods that are "organic" that some say works. In this case, feed the plants now.