Perfect competition

  Why do producers hate perfect competition? Sources: 1) https://www.youtube.com/watch?list=PL1B03A3CAE87226BB&v=ivBLIlhag5w 2) https://www.youtube.com/watch?list=PL1B03A3CAE87226BB&v=krUu_u63MiA 3) https://www.youtube.com/watch?list=PL1B03A3CAE87226BB&v=_-OWuxR0-V8 4) https://www.youtube.com/watch?v=wnmhUpx63kE