1. Weevil?
2. sunburn or mildew/fungus
3. maybe aphid damage
4. aphid damage or mites/thrips
5. dunno, all of the above?
Welcome to my world, well not really, you don't have fungus, root root, fruit flies, root knot nematodes, slugs, snails, caterpillars etc. I see everyones nice plants...