Hi there PurpGod , that's N excess, you can see based on the dark green leafs, the shiny aspect of the leafs, the yellowing starting with the oldest growth first, the downward pointing tips, and the other symptoms you cited. I dont really know what you're feeding but if you can cut down on the N, the plant should recover in 10 to 14 days . Good luck ! hope this helps ! 🚀