Complex sentence: At the start of 2011, big-spending DK invited YaphetS to join their galactico squad, however, they underperformed throughout the first 6 months and YaphetS finally retired from professional DotA at the conclusion of the G1 Tournament.
Split into simpler sentences: At the start of 2011, big-spending DK invited YaphetS to join their galactico squad. However, they underperformed throughout the first 6 months and YaphetS finally retired from professional DotA at the conclusion of the G1 Tournament.