What you should try is to leave Icaras and try the AG-Sys or the mirage,which are fairly balanced ships.
Now,do some Speed Laps / Time Trials on the track you're worst at.If you have no problems and do a better time than your old records? Good! Keep with the ship.
If you have problems with one thing (like turning) try an ship with better stats to focus on fixing your problem,but still a balanced ship (I'd recommend Assegai in this case)
Experience boosting in other places and side-shifting when leaving corners.Those can sometimes give you a new opportunity for one or two barrel rolls...
Well,I don't have time to keep on saying stuff.If you did that and nothing worked,message me and I will tell you the rest of the stuff.Bye!