I felt I should post this as your impression of SC2 is no doubt brought about by your naivete and lack of experience with the game and I don't want this to put off new players. Your view and opinions are more than understandable though as SC2 is probably the hardest online game I've ever played.
To be honest, SC2 is the finest example of a competitive RTS in existence. That is no understatement.
You should know that you're probably not used to the fast pace and are probably playing the game completely contrary to how it's been built to be played. It isn't a slow game. The only reason you think that armies are "small" is because you probably lack the macro required to play into the mid-late game where army size really starts to take off.
The strategy of battles is in multi-tasking and positioning. Without the correct position your 100 supply army will die to a 50 supply army. Also in use of key abilities mid battle and unit composition, which will depend on what your scouting has revealed. Also you need to have built up your base enough and expanded your economy enough so that you can replenish your army as fast/faster than your opponent. Lol, I could go on and on, it's such a DEEP game, but understandably offputting and seemingly simplistic to the new player.
When your force is under attack, you can't scroll to the battle, lol. In a game like SC2 that's your army dead. Like I say, it's a LOT more fast paced than what you're probably used to. Expecially if you're coming from the C&C Series or Sins.
Go to www.youtube.com and search for HDStarcraft. Watch some games, educate yourself. You'll enjoy the game a lot more.
EDIT:- After reading through the thread some more I saw your post about building numbers. Yes, it's different to other games. In a 1v1 game that goes into the mid to late game, it isn't unusual for a player to have 8-10 (or more depending on the map!) unit producing structures. This goes back to the point I made before, SC2 is heavily a MACRO game, which basically means managing your base and having efficient mechanics to produce an army faster and better than your opponents.
Like I say, give the game a chance, watch some VOD's (http://day9tv.blip.tv - great for new players!) and bang out some 1v1. You will lose a lot, and lose hard, but eventually, you will WIN!
So i finally read it LOL, thanks again for the suggestions and the links, i put bookmarked them and look at them tomorrow after work or on th weekend.
Anyway i would like to react to few things:
first of all, that i cant scroll to the place of the battle, oviously it would be more efficient just to click on the minimap or use hotkey for the group...however this still does not make up for the fact, my army died in literally 5 seconds, no exaggeration here... i accept the game is fast paced, but isnt this over the top? Somebody called this twitchy and really that is, what it is. I am used to play Call of Duty, so my reflexes are ok. However somehow i fail to see a logic behind the need to have reflexes like in CoD in a STRATEGY game. I really have to look at those VODs, how they managed to comment these lightning fast battles.
Othe thing, the MACRO, i suppose you lot mean with macro the process of building the base, expanding, building new workers, setting rallypoints , producing units, researching etc... everything related to the economic side of the game, not unit control, right? Well i played Supreme Commander, which was a game i would say all about macro, it played completely different to classic RTSes like CnC or others, it was all about getting your eco going, setting the rallypoints and get your army to the front. Basically who managed to do this better, would ultimately outproduce the opponent and steamroll him.
Anyway, it made sense in that game cause of its scope and scale. If i understand it now, SC2 is trying to do something similar, the key difference for me, is the number of units you can have. The proper eco in SupCom would result in you having massive army, you could see the "fruit" of your good macromanagement in the steady flow of units to the front. The units at the front had actually some kind of autonomy, so you could concentrate on the macro, not to mention, the sheer numbers made inidvidual units unimportant, With SC2 this is completely different, although you have to build massive bases, you wont ever have a massive army and therefore individual units do mean somthing. Unfortunately they are totally dependent on your actions, as they act as a bunch of f*ucktards, ignore enemy fire cause you issued move command...etc.