Complex sentence: The aging of Super Asurada AKF-11 and development of other teams made him lose the title race again in 2019 season, and he abandoned his partner Asurada and driving Garland SF-03 at the beginning of 2020 season instead.
Split into simpler sentences: The aging of Super Asurada AKF-11 and development of other teams made him lose the title race again in 2019 season. And he abandoned his partner Asurada and driving Garland SF-03 at the beginning of 2020 season instead.