That isn't true at all. Alternating actually increases your overall streaming stamina in comparison to single tapping everything, as a single tapper won't be as used to using their alternate finger.Soarezi wrote:
Alternating everything affects the later game, your stamina will become incredibly horrible, you can't stream for long and you cannot compete with the end game anymore.
On topic however, those kind of patterns are easiest to hit by just doing z -> x or x -> z instead of trying to hit them with a single key. Practice doing them that way and eventually you wont have issue with them.