yep, if it was nute burn it would mainly be at the edges of the leaves and would work in from the edges,
it looks to me like you got some kind of nute lockout or cal/mag deficiency, this is exactly how my plants looked when i transplanted to that expensive compost i tried, after a few weeks it cleared but my plant lost a lot of leaves due to it,
let check the problems chart and find out what i can about the problem your having, but it could be nute lock out or some kind of deficiency,
this chart may help you as you can have a closer look at your plant and compare it to this page and see what it looks most like
https://www.420magazine.com/community/threads/plant-abuse-chart.71664/
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