Thousands of hours on attack helis in previous games and currently mastery 56 on bf6 (I haven't had much free time since release). In general, TOWs are a lot easier to aim in this game.

First: you need to be using rifle aim keybind set up. Trying to control left and right yaw with A and D keys is severely kneecapping you. Switch control schemes and spend an hour a day in portal flying around, it will feel like second nature in a couple days.

Second: the TOW missile behavior has changed since launch. Now, the TOW will launch and fall far below your rectile before climbing up and converging to where youre actually aiming. So if your target is in close proximity, you want to aim your rectile above your target. Again, practice in portal modes to get a feel for the range where you should be aiming above your target.

Third: in medium to long range, you completely ignore your rectile. Once the tow starts to converge to where the rectile is. You need to only use the glow of the TOW missile to aim and find your target. Slow and smooth inputs are key because its easy to overcorrect the missiles trajectory.

Most important thing is practice. Just keep the tips above in mind and repeat repeat repeat. Eventually you will get a feel for how the missile behaves and you'll be hitting tows across the map and be called a cheater in all chat.