No, they aren't. They're fundamentally democratic confederalists, which is a leftist tendency, but distinctly different from Marxist-Leninism. There are some Marxist-Leninists among the PKK and YPG, but that's not the core ideology of either group. Furthermore the PKK and the YPG are not synonymous groups and viewing them as such is not an accepted position anywhere that isn't inundated with Turkish propaganda.