What is wrong with this one

At this point might as well let it grow out. Light to high, maybe more topping next time.

sieht für mich aus wie ein extrem Sativa trait kommt manchmal vor das Sativas so eine knospen Struktur haben mit wenig ertrag könnte am ende trotzdem ein keeper sein und extrem sativas fetten sehr spät in den letzten Wochen der blühte und könnte 16+ wochen blühen am ende Viel Glück

Take no notice of grannie, she's got her lycra tight big pants up her grumpy ass 😄✌️ hey grannie

Did it have a household led bulb at a ridiculously high height from it all it's life by any chance? By the look of it, you'd have got more weed for your buck saving the electric and buying a bag off the corner and try growing the next bag seed better armed. 😞 wellllll, that's what it looks like,saliva bag seed too. Sorry for you. I grew my first plant at the top of the stairs with no real light and got upset at the soggy nasty green budlets it produced. You live and learn, but go plant it somewhere random outside, may do you better,depending on country light schedules of nature or up a tree with a canvas grow pot 😄 nip back and check from time to time. Be lucky 👍

Sometimes it happens when it's to hot, or sativa, or both. You may try to take a cut, reveg, and re-try to flowering. If she will do the same, is a sativa or a shitty genetic.

Not big enough light I'm assuming it not good genetics

How can we give advice when we don't have information? With only the information that it seems half dead (no way to figure out WHY) and no buds (no way to figure out WHY - and yet you say it's been flowering for 4 weeks???), I'd pitch the plant. Sorry.