Help am i F**ked, where did i go wrong

i am having a major problem with every plant that i have tried to supercrop, or lst. i tired to grow two plants in a circle, and that failed, but i ended up with a few main branches. The other i tried to supercrop to get 4 main colas.

My problem is that these 3 that i have tried to train are now really f'd up, and the others i have are doin quite well. i had a problem with mites, but i think i got ride of it.

here are some pics. i am growing all the same strain. here are some pics of my babies, i have included pics of my other girls as a reference. I have one that 7 weeks into flowering, and 3 that are 4 weeks in. my others are about a week in. the one i supercropped is the one having problems in flowering, and i still have my other 2 that im having trouble with are in veg still.

the first 5 pics are of my girls in veg.
the next four is the girl in flowering that i supercropped(1 week in)
the next one is the one at 7 weeeks, and the others are the rest of my babies, at 4 weeks and 1 week


please let me know if u need anything else to help diagnose my problem

thanks for looking

Please rotate your pics before uploading, it's difficult to see without twisting my neck.
First off you have a heat problem, see the edges of the leaves curling up trying to conserve moisture, hows your ventilation.
You also have either a PH issue or over fertilising.
You can try and flush them with 3 times the pot size of PH adjusted water at 6.5 to 7 PH, then start nutes again at 1/2 strength.
The supercropping as you called it has nothing to do with the health of the plants.
If you want 4 colas see Uncle Bens topping technique for 2 or 4 colas.

son of a bitch spike.....i was gonna say that. lol j/k of course. yeah i agree its heat and nute burn from what i see. i dont understand how its even possible for lst to fail and cause that damage...mainly cuz its not possible from any scenario i could ever think of besides breaking some branches and/or main stems and it gets infected.

thanks for the help, sorry about the pics. ill flush and try less nutes.
and i just put a fan in the box, could i be possibly giving it to much ariflow

what got me so curious was that i had 3 other plants same strain, same everything and they all turned out good. it was only the plants i tried to train that ended up not being healthy