Dont blame you for ranting,,,,,,,,,,,,,,theyare evil and its terrible when youn have a major infestation and I had one way back.
I was new to cats and didnt know anythingabout fleas, tried everything and in end went to the vet...was last resort and he sprayed Kocka.....no wonder cats are scared of sprays and vets! And was given indorex I think. The spray killed the fleas and the indorex did the house.
Like you I had a flea catcher thingy , it had a bulk and a sticky sheet at bottom and fleas would get caught on it.........still have it somewhere!