I don't think there's a lot of contempt for teachers. There are good and bad teachers, just as in any other profession. There is a lot of contempt for teachers' unions because of their involvement in the decline of public education and the unions' protection of bad teachers, but that's different than hating individual teachers or teachers as a profession.
Also, the writer of that article needs to wake up on two fronts: teaching adults at university/college level is waaay different than teaching kids, and things are done different than when the author was a kid. Teachers don't have as much free range and ability to do independent things anymore like teachers of generations past. Almost everything now is regulated and oriented to state testing.