The first thing I can recommend is patience. Decide for yourself wether you want to really like this game and then if you do, you will get eventually better at it (but accept a certain level of frustration at first).
My stay-alive-tips:
- squad up indeed. This way you can cover eachother and you won't be the only target so you'll live longer, which is good against frustration in the beginning and gives you more time to actually try and shoot somebody.
- Check the map often to see where your teammates are (not specifically your squadmates) and what flags are yours. That way you're more aware of the whole battle and you can better gauge where the enemy might be coming from, where to take cover. Even if your squadleader orders you to another spot you might suddenly find yourself alone at a flag that's under attack and you can call out for backup (or just let your team know they're needed)
- Find out how you die everytime, and respawn accordingly. If you for instance are defending a flag as a AT guy and your killmessage says "MP40", don't respawn with the bazooka again but with your own SMG. You can also alert your squad mates (you can still type after you die) about the enemy and maybe they can get him so he won't be there to shoot you again.
- If you find yourself facing somebody in close quarters, don't forget your bajonet/knife/shovel is more usefull than your rifle (or sometimes even your SMG), but it takes a little while to get the hang of stabbing people.
- If you see an enemy try to confirm what kind, before you start shooting. For instance if you see an enemy soldier running towards you in the distance and he has a rifle and you a SMG, don't go head to head with him because you'll miss and he won't.
The same goes for tanks. You'll only piss off a Tiger when you try to shoot it across half the map with a Sherman just because you have to try it. And this way you'll have the initiative and can at least decide to try and flank him.
- Choose your class wisely, and also notice the difference in open maps (like the desert maps) and more dense/crowded maps like Sfakia or Lüttich (I guess; the one with all the trees and the fancy HQ villa) when you choose a class. It's no use assaulting a flag across open desert with an MP40, but if you spawn in a rolling halftrack getting ready to unload inside the cap-zone, do bring it.
- Know the map itself. Don't worry, you don't have to know every little nook and cranny to enjoy a round, as long as you notice the "flow" of the battle. This way you can check where you have to be. On Totalize as a german you can for instance focus on the natural chokepoints this map has (ie. the trainbridge) and man a PAK or somehting. There are some really detailed strategy-per-map threads on these board which helped me a lot to understand how maps work.
These are basically things that popped up when thinking back to when FH2 came out and how at first I just wanted to stay alive a little longer, let alone kill anybody.
So stick with and it will only get more rewarding once you get the hang of it a little.