Garland hasnt been as big of a health issue as it looks. Right now he sprained an ankle, it happens, he will be back soon.
First year he played 59/65 games, so in a normal season that is 75 games, that is good.
2nd year he played 54/72 games, so in a normal season that is 62 games, not good, but not terrible.
If you look at his first 2 season he has played in about 83% of the games, or 68 games out of 82 if he had played in an 82 game season. Really not bad.
Windler has played in 31 out of 137 games or 23% or 19 games in a regular 82 game season. Throw away the 1st season to a weird injury and its still only 37 games in a regular 82 game season.
They are not even comparable. Kyrie only played in 110 games his first 2 season less games than Garland and Garland has played in 2 shortened seasons. Just saying a normal season a player will miss 10 games or so, Garland has missed the equivalent of 14 games a season, not bad at all honestly.