Hi folks! I have written quite a lot here complaining about bad qualifying systems for the Olympics and World Cups in different team sports. I wanted to make a centralized thread to discuss it.
Of course, each team sport has its particularities. Rugby union matches require 5 days of rest, whereas a full 16-team rugby sevens tournament can be played in two days. Some sports have more worldwide parity (like football) while others have strongholds (like handball). And of course some tournaments have more teams than others.
The first problem is using world rankings, which prevent upsets. For example, Brazil and Argentina are at the top of nearly every team sport in South America. When rankings are used, no team has a serious chance of qualifying instead of those two. On the contrary, continental tournaments should be mandatory. The worst offender is volleyball, whose Olympic tournaments will have 5 teams directly from the world rankings.
A related second problem is using world qualifiers to award most if not all spots. This causes some problems: drawing can help some teams and punish others despite seeding, and some continents may get squeezed out. I'm fine with using world competitions (be it previous World Cups or Olympics, world qualifiers or world repechages) to set a few teams, but not most of them. For example, the Olympics field hockey and women's basketball feature no continental qualifiers at all.
The gold standard is football, which features very few repechage spots. Another excellent example is rugby sevens. The 2024 Olympic men's basketball qualifying is complex and could be improved in many ways, but is not strictly bad.