It also just might be that your temperment is just not suited to Rook.  I know some players who are very good, at say TB, who just don't have the right mindset to play Erebus. (Good at micromanaging nukes, bad at knowing when to chase.... and how to come back alive)

"temperment" this post made me lol, trying to back it up was even better

I can help you out with playing either Renthe, id disgard Zechno's post

No, I'd actually agree with Zechnophobe. One can expect a person's playstyle to greatly effect their ability to play X, Y, and Z demigods, and some of us are simply more adaptable at others. Stick with QoT if you think you work well with her

Well, I have met people who is quite (and some very ridiculous) unadaptable to things they do. I think psychology scholars can still debate over what caused this.

However, I don't know if that's the situation here.

I'd say Rook is probably the hardest Demigod to survive as, especially on any of the larger maps. He usually has to sacrifice HP and Mana to just be as fast as everyone else is by default, or pray he doesn't get interrupted to be able to escape.

 I think Zechnophobe was definity right. The other posters are claiming that Rook is good and you just don't have a clue how to use him, or that Rook is kinda underpowered right now. The Truth is some of the best players on the boards are Rooks so he isn't all that crappy, however that being said many players do suck with him. The thing so many people don't get about this game is the ballance is actualy pretty damn good in this game.  Hence all the arguments about what and who is best and what items are best and which are crap and so on. The truth is you have to try things out for yourself and see what fits you and your playstyle. I suck with Rook and will be the first to say it, I keep trying him every once in a while becouse he is so damn sexy but its always in vein. Even when I win with him it's a close match or somone on the oposing team droped out. I like the idea of Rook but I just do a lot better with Regie, Sedina, Qot, and UB.  I also Do realy bad with TB and Erebis for some reason. I have read all the strats and builds, and am not an idiot. Just some characters work way beter for me than others. But those same characters that I personly don't do well with have been played very well against me at some time or another. Try them all out and then tweek your stratagy for the ones you do best with.

I'd guess that Rook just isn't your character. QoT probably just matches your playstyle more than Rook does.

I would would say that Rook is possibly the hardest to play DG along with QoT.

There is something about him that is inherently weak. A lot of his abilities are situational and passive and require a lot of skill.

TB, UB and Reg as assassins have easy to understand tree skills and easy mechanics (TB can be a little more complicated, but going Ice or Fire, you can still play him simply). Click on Fireball, easy 1050 DMG, click on Spit easy 1650 DMG DoT, click on Snipe easy 900+ DMG.

Rooks big problems is that he has no burst, to lay down massive damage he has to Hammer Strike, to get that off, the player has to be extremely skillful, unless they are playing an AI.

I have seen some great Rook players, but the most part people get squished easy, I certainly get squished a lot when I play with him.

 i think the person behind the monitor is the problem here

Rook takes a lot of plannng and forethought, because Hammer Slam is your only SAVE ME NOW ELSE I'M FUCKED move. Whereas QoT can shield till the cows come home if she left herself some mana.

Meh, who needs to be fast? Nothing wrong with playing a rook build and trying to get him up to the same speed as everyone else, you're just gonna suffer some penalties. I played rook for my first couple of games and had no trouble at all winning. 

It does come down to temperment somewhat. I have a friend whose favorite unit is the queen, and he is incredible with her, because he has the temperment to micro the idols and shamblers (especially moving half-health shamblers in close and mulching). I don't have that, so I tend to play rook, because I have the patience to not care that I can't move fast so long as nothing in the world can hurt me (and trust me, a well played health rook is pretty much invulnerable to anything 2 demigods can dish out, 3 is where he starts dying, but 3v1 should never happen, or never happen without the other team suffering, if you have decent teammates).

Sounds to me like the OP just didn't have the temperment to play rook and had the required temperment to play queen. Sure you can play whatever demigod you like (I've played them all multiple times) but everyone has a certain playstyle, and some demigods conforms to yours better than others.

In case you're interested I play a very high HP, low burst, siege rook whose job is to demolish enemy towers, then run back to a tower farm for safety. It works great for me, I get few DG kills, but I tend to be in the enemy base pushing hard long before they've even thought about taking down more than the outlying towers. I'm of the opinion that if you try and play rook as a demigod killer, you'll never be satisfied, because he's not good at that. If, on the other hand, you play rook as a siege/countersiege (extra towers at a location can prevent/push back an attack on that location) you'll find he's one of, if not the best in the game at this.