EPTif you watch your friend's games, you'll notice him making many mistakes also, that you'll want to point out to him.
but don't. there's actually no reason to tease him back, your goal should be to improve so you may enjoy the game better and the quality of time you spend on the game is better as you gain skill.
it isn't required of you to be snarky or know it all.
in a lot of your games you will be picking heroes that could be very good against what you're up against in lane, but end up doing much worse than you could be. in order to start a learning routine where you stop depending on the coinflip of teammates you get (who may or may not carry you),
set a bar for yourself for how well you need to do [in lane] in order to consider it a success.
the most basic thing i see laners doing is not right clicking heroes when having more regen or a hero is in walking distance of helping. the earlier you can establish your rightful dominance in the lane, the better your lane will be later on.
if you are a juggernaut laning against a pudge solo, there's no reason why you shouldn't be able to right click him and win the trade. the pudge will quickly realize that if he sits in the lane rotting, he'll get spun on and lose.
then whenever you walk towards the pudge, he will always back away, further and further to the point that he can no longer come back to lane, guaranteed.
if you set that goal for yourself, suddenly, you will seldom lose lanes against heroes that you shouldn't be losing against, or when you meet better opponents/matchups you can set new goals and figure out what needs to happen for you to achieve that very same success.
you can use that concept for anything in the game, including how your teammates are playing.
here is an insightful post by chu8 (hots) about climbing MMR.
http://www.twitlonger.com/show/n_1sprm22
