I’ve always had an inkling that at least half of pay per click traffic is bots. I must have tried PPC with 20 different businesses that I’ve ran or helped with

I’ve always had an inkling that at least half of pay per click traffic is bots. I must have tried PPC with 20 different businesses that I’ve ran or helped with, and I don’t think I’ve ever really moved the needle with it. The vast majority of traffic just bounces even with every best practice in the book followed. I feel like it’s a game that everyone has to play but theres a little emperors new clothes about it where nobody will admit it’s a waste of money.