I never played classic before but I saw the latest Stream from Rarran, in which he faced like 20 Bots on a row in Classic.
I wanted to see it myself so I tried classic this morning. I play on EU.
But starting on rank 10 bronze I only saw authentic player. I played all the way to silver 10, probably around 1-2 hours. All of them had alternate Portraits, mostly golden Heros, played netdecks and non of them played any Murloc card or non-Meta Builds or made any sus plays. Also the queue was most times between 2-5 minutes.
I quit those games before the end, there is just no fun facing a dumb opponent with an awful deck…
it doesn't make sense, dude. dumb opponent with an awful deck = easy win. Why should you quit those games? you should answer yourself a question: why you are playing HS? if the answer is "for fun" - then make a meme deck and play casual. ^_^ Otherwise do not quit games ffs.
It's likely that most of the players you played did exactly the same thing as you. Because a relatively big streamer played Classic, it encouraged other people to play Classic which drastically reduced the amount of bots people played.