Bus Vannin says it's had more than 500 complaints about its drivers in the past five years.
A Freedom of Information request asked for the figures since 2021.
In its response, the organisation said 528 complaints had been made in total, including 386 about driving standards.
Customer interactions accounts for another 111, while 31 complaints were made about drivers' behaviour.
DEFA releases figures on leased land
MNH invites bids to run popular cafe
Fury finally confirms venue for Joshua fight
Quayside road closure extended in Peel
Mars needs MHKs, says space society
Historic replica ship arrives in Douglas
Vandals were flung poo fighting in Jurby
Don't give seals raw deals, says Wildlife Trust