I think your biggest problem lies in one of the fundamentals of the game, and that's where to look when you're supposedly "tunnel vision"ing on your hero. You actually do tunnel on your hero, which is really, really, really, tremendously bad. Whenever I watch your stream your frame of view around your hero is pretty awful. Since everyone wants to talk about the Shadow Shaman game, here's an example:
http://www.twitch.tv/hylian7/b/518290082?t=13m10s
This is after you've come back from being first blooded. You have the camera focused on yourself, with your hero at the bottom of your field of view as you walk backwards to your tower with no creep wave against a Mirana. You then go and eat the tree farthest from the direct path back and walk back to the tower, get slammed by an arrow, and die. You then declare your hatred for arrows and Mirana. This also results in the death of your Centaur and nearly your BH.
This entire situation could have been avoided had you simply looked at the enemy heroes in the lane that were in your vision. Mirana didn't throw the arrow from the fog, or through trees, she threw it right in front of you and you walked into it. The correct way to play this would have been:
1) Realize you're laning against Mirana, she will try to arrow you because you're retreating alone in front of her creep wave, day 1 Mirana gimmick.
2) Proceed directly back to your tower before the last creep in your wave dies. You're shadow shaman, among the slowest and squishiest heroes in dota, get yourself out and don't present yourself as a target ahead of your centaur. Move command to behind the tower.
3) While you retreat move your camera down and
watch what the enemy does.
4) React accordingly
Even in the exact same path you took death could have been avoided if you had kept your hero in the top of your frame rather than the bottom. You would have been able to identify the arrow before it entered the visual traffic of the creep wave and avoided it, hopefully. Think about it: what information do you need from ahead of your hero in this situation? In this case the area behind your tower. The important information was
behind your hero, where the enemy heroes are located and trying to kill you.
When controlling your camera always consider where the action is coming from. You don't have to issue a command and watch your hero carry it out in a place where there will be no variables you don't know about or aren't things trying to kill you. Obviously as balance must be struck and you need to be able to catch surprises, you also have to be extra careful when there are invisible or blinking things, as they can interrupt your otherwise safe paths. Another example is, in general, if you're on your way to a teamfight or skirmish you should be looking at that fight
on the way there, rather than watching your hero walk there, so you know what's going on in the fight and can plan how best to help. This is probably applicable to most players in this thread as well, so keep this in mind people.
I think you hate Mirana/arrows because of this camera control problem. You don't see them coming and can't react because you aren't looking in the right place. Be more mindful of where you are in the frame to try to maximize your significant vision at all times and arrows will be easier to dodge.
PS: An add on: while I was looking for this clip I saw the first blood as well. You opted to cast a channeling spell out in the open against a Kunkka and Mirana knowing their powerful, slow, skill shot stuns we're off cooldown and available. You ate both of them, died, and said this is why I hate support. That decision making is absolutely abysmal and has nothing to do with playing support. Don't ever present a target that easy to those heroes, of course you're going to die.
PPS: I hope this post isn't wasted on you, camera control is an important and fundamental aspect of Dota and is the most jarring problem I see of yours whenever I watch the stream. It spans all heroes, and improving it will significantly improve your play. Don't ignore this or brush it off as you do many other bits of advice, remind yourself throughout the game, and especially laning, to be aware of where you're looking.
