Having a bad game has no limits. A bad game can go from missing two lasthits in the first 10 minutes on a freefarm lane to going 0-10 in 12 minutes as solo mid. You can't make your teammates better by observing them, much less by flaming them. What you can do is adapt to them. If I see, for example, our solo mid dying constantly, instead of going holyfuckhowcanhebesobadhowdidheloseaspudgetobloodseekerhowthefuckdidhenotseethatguywasmiss ingholyshitthisgameissolostblablabla what I'd usually do is ask them if they could play more safely and walk my earthshaking ass to the trees behind middle and stop any further ganks. Can't always save a game but sometimes it does wonders.