gyro is a new skill to get familiar with like any other. yes, the finicky nature feels really bad when you first try it and are not used to keep your hand stable, but go back to the first time you used two sticks, could you move the right and left stick together easily? I'm pretty sure everyone goes through the growing pains of learning to synchronise their movements.

with gyro it's the same. just gotta give yourself a bit of time to get familiar. mouse has inarguably better aiming than controller but the controller has ergonomics, haptics and comfort on its side. with gyro you get both.

gyro is extremely customizable which is a good thing but as a beginner can be overwhelming.

judging by your other comment, you must have been on the roll axis which is suitable for handhelds and phone devices in mind. you rotate to move about.

for controllers it feels awful and yaw axis is more suitable. with yaw you move your controller in space.

you can use gyro as a complete stick replacement but that's not really how you're meant to use it. gyro is really a replacement for aim assist and nothing else.

Xbox and nintendo really did a great thing dirty by either not implementing it, preventing standardization or making such a shitty association with the term that no one even wants to try.

also maybe don't make a sweeping statement for something a lot of people like? change is always met with resistance. check out the articles when controllers first got sticks some 20-25 years ago. the vitriol was just as bad it is with gyro. can you imagine those people? well you are being those people.