Jack Burns is introduced as Warren, the new Deputy. Burns replaced Barney Fife (Don Knotts), who moved on to make movies. Burns must have hated Don Knotts and the character of Barney Fife, or else he was just a horrible comedian. Burns takes all the best of Barney, and turns it into a sad and annoying parody.
When Barney was a stickler for the letter of the law, he made it funny. In the clumsy hands of buffoonish Burns, that schtick is more annoying than having your skin scratched off by wolverines. It seemed like Burns intended to be a parody of Barney, and somehow make that funny. I just have to think that Burns was dumber than a post, and had no clue what made Barney (Don Knotts) funny.
Jack Burns joining the cast as replacement Barney was even worse than Goober becoming replacement Gomer. Now there were two characters on the cast that were B grade at best. This was the beginning of the end of this show. It never survived the loss of Don Knotts.