this is absolutely right, and can’t be said often enough (especially in this forum where many people - mostly just repeating what they’ve seen others saying - will wrongly tell you the opposite)
not only is 1:3 very unlikely to be steadily profitable for you, but it’s also extremely difficult to handle regarding safe position sizes, as the losing periods will be much, much longer than you expect
1:1 or 1:2 are far, far more likely to be profitable and viable for you
and note Steve’s other very good and helpful points above, as well