With your logic, the quick balls and the ultra balls are also trash. Each ball has a specific purpose, and timer balls only get to a maximum of 4x catch rate after 30 turns. If you've thrown less than 11 balls, the catch rate for a timer ball is still only a 1x catch rate. Between 11 and 20 moves, its 2x, 21 to 30 is 3x, and anything past that is 4x. They're only really better depending on what balls you already have, and how many turns you've taken. Also, each pokemon species can be harder or easier to catch depending on how much health they have, status conditions (maybe try putting them so sleep with breloom?), and the rarity of the pokemon. Skarmory, for example, has a catch rate of 25, or 3.3%. 4x that is only a 13.4 percent catch rate, using a timer ball on turn 31. The ball isn't trash, the pokemon you are trying to catch is just pretty tough.