One last attempt at rescue

Permanent poor and fluctuating environmental conditions bring such a picture to light. Your VPD is way too high... we already clarified that. Your plant is burning because it can't transpire quickly enough, as would be necessary with such a high VPD. This causes nutrient salts to accumulate in the leaves and they burn. Unfortunately, you need to find a way to lower the temperature in the tent (different room, less light, hang the light higher, stronger exhaust, open window... for example) and also increase your humidity (humidifier, spray the inside of the tent walls with water, for example). Check out VPD tables online and get the sensors that allow you to monitor temperature and humidity, preferably ones that also show you the current VPD. VPD - Seedling - 0.6 kPa VPD - Veg - 0.8 to 1 kPa VPD - Bloom - 1.2 to 1.5 kPa

Scrap them all, scrub and disinfect your grow space and start again would be my advice. So many issues, so little potential.........cut your losses and put what you have learned into your next grow.

Wow got a few pointers here for you buddy 1. move your light down when in earlier stages bit late with this on but you have very large internode spacing this means the light has been kept high the whole grow which has negatively affected your yield 2. it must be very hot in there for the leaves to curl up like that. 3. I would not try and sort the pests as you are quite far into the grow and always recomended not to spray plants that are in flower. 4, stems being purple is completely normal its the plants natural reaction to intense light it will fl;ood the area with pigmentation as to better absorb the light. it will only happen to leaves in direct contact with the light if you notice :) best of luck buddy.

I'll be brutally honest with you, unfortunately she looks like she has had way to much nitrogen or the light was to intense a good few weeks ago. Damaged leaves will not recover. I don't feel there is much you can do now to rectify it. Your probably going to have to ride it out until the end. But it will have helped you learn what to do and not to do for your next grow. Good luck.

Lower N, increase PK also add Cal mag, basically switch your feeding to bloom For thrips use blue sticks, neem oil, Insecticidal Soap...