Factions all go to war in mid and late game and it is very hard to be friends with everyone. As soon as you do haven defense of one of them you lose reputation with other 2.
Don't lie on the internet, fucker.
I don't know how it works in your Easy campaign but in my Legendary campaign they all hate each other and are completely incapable from protecting their havens from Pandoran attacks. I have to do all the defending or the Index thingy goes up. And every defense gives bonus with that faction but minus with other two. Only defeating Pandoran lairs and citadels gives bonus reputation with all 3 factions.
Doesn't this game have inverse difficulty?
I looked at Kaen stream, and he was hiring a soldier for 300 food. Now, in normal difficulty when someone shoots your soldier and you need replacement to avoid fighting at 4 soldiers, and don't play at difficulty level asian. You need to pay 300 - 480 materials and some tech as well. Thus legendary difficulty player can replace in mid game a soldier for 10 days of production of material on base. Normal difficulty, either need to scavenge, or was able to keep sufficient material reserves, just in case.
Thus situation, three snipers shot at one soldiers and blew up his head off. Now we need to replace new soldier. Would be solved differently on 1. legendary 2. normal
1. We wait for our food production to get 300 food and fly to hire new one. We have equipment from first one, at worst we would need to manufacture new weapon.
2. If we don't have enough material and tech in storage, we need to either do fort defense missions, or scavenge on some sites. Then we would move to hire new soldier, which comes with his own weapon, which we can't produce ammo for and when it runs dry, we would need to make our weapon anyway. It came with armor that either kills stealth, or is quite vulnerable to stray machinegun rounds.
Now what happens when someone wants to hire new soldier?
1. We got new soldier and now wee need to spend time to make weapons and possibly armor for him. (Aka need to spend material and tech to manufacture these weapons and armor.) Soldier needs to wait until at least his weapon was manufactured (can he go without armor?). But if there is training facility in base, he can train before his armor is manufactured.
2. We got new soldier and he has weapon of HIS OWN FACTION, and now we just need to decide if we can use him in our squad with these weapons and armor, or if we need to outfit him with weapons that would complement the squad better. (If the soldier needs to be outfitted by something else, you spend additional material and tech to make weapons and armor, even when you spend material during hiring the soldier.)
Now imagine that someone wants to make something like heavy, with cannon and sniper armor... Step 1. hire heavy. Is NJ only place where you can hire heavy? Step 2. Manufacture the sniper armor. Step 3. NJ heavy comes with heavy machinegun, thus next step for heavy with cannon is manufacture cannon. You can multiclass him into sniper to allow him to use hell II cannon with sniper skills. Sniper rifle needs 3 action points, hell II cannon needs 3 action points, thus sniper skills work awesomely.
As you can see, this is also easier on legendary.
(Then we have people who were able to finish game in 6.5 hours, and well if difficulty curve doesn't ramp up much more slowly on normal, he might have easier time on 6.5 hours on legendary, than a normal player.)