# IQ data QPSK Demodulation

I have an IQ data of QPSK signal , when I apply a PLL loop I obtain constellation in figure below. What is this phenomenon, and how can I obtain the good constellation??

The second figure is about variation angles, is there any idea about the red countoured effect?

after adding symbol syncronisation , i obtain constellation below , but there is also sommes error that causes incorrect demapping ;; is there any suggestion ????