In my experience bitcoin cash is a fork of bitcoin even BCH is faster and cheaper to use due to larger blocks but still it'a seen that most of the people are using BTC than BCH so why is bitcoin doing better than bitcoin cash?
You are questioning the unreliability of bitcoin over bitcoin cash is just insane. Bitcoin is the master of all altcoins and it is the beginning and I believed it will also be the end. Bitcoincash has cheaper fee but its not that fast enough in transactions blocks to be in talks of bitcoin not even with ethereum.