Quitting a Competitive Tournament early hurts other team members. To keep things fair, there are penalties when quitting early.
Quitting early the results in:
- 15-minute matchmaking ban
- A ban from the next Competitive Tournament joined
- Forfeit all rewards of that tournament
Continuing to quit early can escalate to:
- 24-hour tournament ban
- 7-day tournament ban
- 24-hour matchmaking ban
Finishing tournaments, by winning or being eliminated, reduces further potential penalties.
For more info check out: Revamped Tournaments A Closer Look.