That's bull crap...sachin was an excellent Test captain. He had a tendency to give a lot of bowling to pace bowlers but they just didn't have it in them. His idea was to groom a pace attact for India. But Srinath lacked the steam to bowl 10-15 overs on the trot at a consistent pace and good line/length, and field with the same energy on a given day.
Even to the day he retired, Srinath could not get the ball to leave the right hand batsman off a perfect line and length. Contrast this with the arsenal the Aussies had at their disposal. McGrath and to some extent, the the other Aussie bowlers, did that like it was bread and butter for them. While Srinath would release the ball a good 2 ft across from the umpire, with the ball always angled in, McGrath's arm almost collided with the umpire before striding in to release.
That is why Sachin quit as captain - its just a waste of time managing a bunch of non-performers - esp. if it affects your batting also - '99 tour was a classic example. Just not worth it.