PRIVATE LOBBYS CONSTANT CRASH

AHHHHHHH I am So Annoyed with this … Since I cant control the specifics of cars in " FREE " yes " FREE" … FREE PLAY … I have to create a private Lobby … not a problem I used to do this in F4 … Because I like Oval Racing and none of my friends do … I figure ill just do what I normally do and create …blah blah … here is the Problem … I CANT USE IT ALONE … if I put my self in a lobby for 50 laps … with 15 Driveatars … IT CRASHES … every time I have yet since the game release been able to finish even 20 laps …now I know it cant be my internet because I am in a league that runs 30 laps at all Forza Tracks … and I havnt had a problem at all …and here is the kicker … I am 1 of 2 …AMERICANS in the lobby … 6 others are from the UK … and not even a LAG … what gives … here … its so ANNOYING … is there a work around here … besides …playing free play which isn’t really free because … I cant make my own specific races anyway .