Half pint peas

My first time growing peas and it's not looking good. They're not growing very well at all, and some leaves are getting yellow. I transplanted them around 1,5 week ago to a raised bed.
It's been quite dry and warm recently (between 17-23 degrees during the day), so I'm wondering if I don't water enough? Too much sun? Please help!

 

Yes, but probably not long enough (about a week). Fingers crossed, thank you

 

They dont look bad, hungry maybe. Liquid feed mixed with water. the tops look better than the lower leaves so there's hope.
I think maybe that these were sow too early/allowed to develop too far before planting out.
I sow into 1metre lengths of scrap plastic gutter (available to collect from skips nationwide) When they are 25mm-40mm tall, soak compost thoroughly and then form a gutter shaped channel in the bed. Tip gutter at 40 degrees starting at one end of channel and they will slide out as you move along, a bit like toothpaste from a tube (dont squeeze !)
You can space them by varying the speed you move while tipping. Then stand up any that have flopped and firm gently with a rake or similar. Would only water then if no rain for a week.
Insert twiggy sticks to support, size according to variety/height.
You may need to protect them/the crop from pigeons, sparrows, jays and slugs/snails of course
Plenty of time to sow more. a sucession is better than a single harvest.