I totally agree also your ph is extremely off major leaf curls sucks it happens buck up and start over next time use better ro water nutes it needs and please let it get fresh air.Yikes, looks like a whole slew of issues. Definitely see some powdery mildew on your leaves. And in a couple shots looks like there is some mold growth on the leaves. Not sure could just be the pics. Also looks like a combination of deficiencies. No offense but she looks pretty haggard. I'd be tempted to start over as I don't think this plant is going to produce much of anything even if you can get it to go into recovery.
I'm using dirt, temperameture is about 25°C and humidity around 60%Is that coco you are growing in or dirt? If it's dirt it looks like it needs a healthy dose of perlite as I don't see any at all. Which could be a contributing factor in your issue. Might be starving the roots for oxygen causing root rot. Also, what are your temps/humidity like? looks like it might be a bit humid since you have the PM and mold. getting your temps and humidity dialed in makes a much bigger difference than you might think. Not sure where to start on this one without more info but there are a couple things you should look into.