Red Dead Redemption xbox 360 help?

i mean wtf i just went into legend again 3rd time and i am sick of these lv 10-30 noobs spawn killing me because i am lv 1 again its pissing me off i am just sick of it or being invited to a posse just so your own members can kill you with the explosive riffle can anyone mod me a custom match or help me lv up again i am just sick of it all i dont shoot unless i am shot at and the noobs are annoying try planting bombs at pikes i get sniped while planting