Partially but mostly not. You have to understand the important distinction between the written torah and the oral torah. Think of it this way: judaism is like a speech, and when a speaker gives a speech, he does not write down every last word he is planning to say with every last detail. Rather, he writes major themes/topics in the form of bullet points. The written torah introduces all the themes and bullet points, but all of the details that are crucial and come along with it were given to Moshe on mount Saini who then passed the information down via an oral tradition generation to generation through the elders/sages of each respective generation. Eventually it started to be forgotten so Rabbi Yehudah Hanasi followed by Ravina Rav Asi and Rav ashi encoded the oral law into the the written Talmud. Roughly 95% of halachic law has a basis in the Talmud.
Also Rabbis were given the power by the Torah itself to make fences/boundaries for the people to keep them far away from sinning, so I guess technically you can say that those laws are "man-made" but really they are not because they were given permission to do this explicitly by Gd in the Torah itself.