I'm no rookie, i've played many strategy games, some even on the hardest difficulty.
I've started with ED on Average. First 2 missions were sort of easy, but then i came to a third one which was freakin hard. First you have to destroy a small base in bottom left corner and collect 10k resources. On Average i get tons of LC units, mostly air units that i just can't fight off. First i have a units limit reached with Pamirs that i collected over first 2 missions and second is that i only have crappy cannons and machine guns. LC is showring me with rockets from all sides. I finally managed to finish this mission on Easy just to collect 10k resources and then run away while they were hammering my base.

Next mission i only start with 1 dozer and 3 transport Taiga's. I move 10 meters and i get showered by LC tanks again. WTF!? This game is freakin impossible to play and i hardly started it. I don't remember it being like this when i tried demo years ago. And i also tried a full version at friends place and it was nowhere near this freakin difficult.
Any idea what's wrong or what i'm doing wrong?

@ rejzor

Yeah every Earth series game was hard. But all of them are possible.

I still remember how i was screwed up in 2140 starting with nothing and in 4 minutes to be hammered by full force attack.

2150 is no diffrent.

I remember playing this mission in a demo years ago where you start with a dozer and 3 taiga's and you have to get to a research compound. And i did it rather easily. But now when i bought the full original game here on GOG, there is no freakin way to do it. If i rush to the research compound LC tanks hit me next to the river. If i wait, LC tanks come to me in like 5 seconds. If i want to evade them, they get me anyway. WTF!?
I loved the concept of this game years ago because it was bonkers with all its upgrades and ammo supply routes that no other game at that time used. But this is just stupid.