Whats wrong with my plant

So I planted this seed back in march and she's still not fully flowering... wtf is going on...

if its only been in the flower photo period for circa 60 days, it's not enitirely abnormal.
It looks healthy enough, so I'd suggest not doing anyting too drastic. give it another 30 days and it will thicken up.

Looks like it had some shock factor that may have stalled things.. so just play it out.

Just saw it's an auto- what light cycle are you using? and have you changed it? but even so, it looks pretty healthy to me so 'don't try to fix it if it ain't broke'.

Its takes a bit of work to lock in the auto trait if your trying to make a photo strain auto. With so so many "breeders" popping up there will probably be more than a few who wont be able to lock in the auto trait fully an alot are just reproducing auto strains that someone else has already made.
Can I ask what strain it is an the breeder please, if you dont mind saying. It does look like its in full flower though.

Just red, barney farm white widow. It might just be the genetics. Some autos have been heavily inbred wich can cause some seeds to behave weird or be very slow, sickly or have very low yields. Could just be a weird seed.

Cut your n down in your feed mix an up your pk that should steer it more towards flower. Might take some time due to the seed being a bit weird but it does look like a good phenotype, I bet if you can get it to the finish she comes out really nice.

Clearly overfed from all the pics you uploaded mate. Yellowing from inside out, tip burn, claw - textbook overfeeding in coco. Could tell that without even reading your post about runoff ec being way high.