TA cannot be used in isolation. This is why it fails.
TA has to be used in the context of fundamental analysis. TA is to be used only for entry/exit.
Both FA and TA has to used to make a trade and This combination of FA+TA is the hard part in trading.
Anyone can do TA , even your grandmother. But not everyone can do FA+TA.
The 10% who do make consistent profits use the FA+TA approach , while the other 90% losers use only TA approach.