Back on that, you must be really fucking bad to not be able to overpower a single dude especially if you're talking
Three things.
Our invaders generally fell into 2 categories. The first being the naked fisting ninja with seemingly-infinite stamina and iframes. These guys would flip around all over the place, making it pretty much impossible to corner them, and almost all of our attacks would miss. One guy we actually managed to corner briefly, but despite the both of us swinging away at him, none of our blows landed whilst he rolled around constantly trying to escape (which he eventually did). He must've been sweating iframes. The second one being the heavily armoured and armed guys, who were basically invincible, with enough poise to tank our crappy swods, whilst taking off half our health with any counter attack, and had a ridiculous range and deadzone. Even if we did corner them, one swing would all but murder both of us, meanwhile all we had was our +0 starting longswords, which took off barely 10% of their health at best. The few times I actually got a backstab in, it took off a quarter of their health at best. When any of them did the same to us, it was almost guaranteed death, and we couldn't even help each other since you're apparently invincible whilst performing the animation.
They also had a significant amount of time put into the game. I checked the profiles: One had 172 hours in game (along with multiple vac bans), one had no profile set up to check, another had 183 hours, and another 3 had over 430 hours in game. This was not their first rodeo. They'd probably been in 2v1 situations many times before. They knew the map, they knew the starting classes and what equipment they had, they knew the weapon ranges, the amount of stamina we'd likely have, the backstab zones, parry timing, poise, how much it'd hurt to trade blows, etc etc. Knowledge is power, and they had it all. Meanwhile we had about 4 hours each, and half of that was just probably just going through the starting area and getting things set up.
Third, we tended to run into them after we were already injured and had used most (or all) of our (un-upgraded) estus (yeah yeah it should've been easy with both of us, shit happens). They arrived fully healed with all charges (or at least more than 1), and aside from one guy, they all gleefully used their estus, which was clearly levelled up given how much health it restored, i.e. all of it.
The fact that there was two of us was basically irrelevant. We were outmanoeuvred, outgunned, and frankly outclassed. It was like pitting 2 pomeranians against a wolf. Coupled with the fact that we're on different continents so one of us was always lagging a bit, our numerical advantage was worth nothing.
I'm not completely disregarding our skill level as a factor, but to place the blame solely on that is ignorant at best.
(or both? 
). in DS3 armour is barely relevant and poise nonexistent (although i haven't tested it at low levels so it might as well make a difference as somebody else posted), and, as Hyperion already said, matchmaking also takes into consideration weapon level so if you had +0, your opponents could've had at best +3. also also, there's no agility in DS3, so they couldn't have had "iframes for days" or whatever, there's no difference between 0 and 70% eq load, and the only way they could make theirs better is with the ring that makes them take more damage, so you were either mistiming everything completely because of lag or just inexperience
