@riri23
It would be good to see a couple different orthopedic knee specialist doctors for 2nd and 3rd opinions about whether additional surgery would help. At a minimum, physical therapy should be attempted again. Tendons and ligaments plus nerves were most likely affected when first injured. It may also be good to see a neurologist for EMG/nerve conduction testing of lower limbs to see how affected.

Having knee injury can affect hips and thighs and alignment so it is important to address this imbalance as soon as possible because it can worsen if neglected. Physical therapy for the knee is very important after surgery to prevent long term/permanent issues due to scar tissue.