Poor Gaming hit reg etc on Openwrt

Been having poor hit reg in call of duty and battlefield games,
Have recently moved for virign media to FTTP supplied by aquiss
When playing on my asus router ac rt88u running merlin in game ping 30ms hit reg is ok,
Having moved to fttp my hit reg seem off in game my ping is alot lower hover between19-23 in cod and bf games. yet bufferbloat is A+

Zia