Pepper leaves browning and drying edges

These plants were fine indoors early spring and summer then I popped them out in the garden and I don’t know if it’s the weather, the leaves are droopy, yellow and the edges of the leaves are drying and browning. Also seems it’s been eaten by slugs and snails. I put a layer of mulch but not sure if it helped. Any ideas what the problem is? The soil is damp as there was quite a lot of rain recently.