Borg Shield + no Field Generator consoles means you were going in without a whole lot of shield capacity. The regen isn't all that good because even post critical hit nerf the Borg do too much spike damage. You need capacity or resistance, and you can still get the two and three piece Borg set bonuses if you get the Assimilated Universal Console from the mission "Assimilated" without having to use the Borg Shield.
Get the MACO shield if you have the Tech/EDC (even a Mk X one) or one of the Covariants with Plasma Resist you can get from the STF store with Salvage. The one with [pla*][cap]x2 is the one I'd recommend. I would recommend that you get at least one Field Gen to boost your shield capacity.
I'm not saying the Borg definitely will never one (or two) shot you ever again, but changing your shield would make you a good deal less squishy.
Can't really explain why it was much worse on that run than the previous runs though.
*This may be still showing as [Ap] (antiproton resistance) when it actually means [pla] (plasma resistance), I haven't checked it lately.
to your mainquestion infected is still same easy like always nothing is changend the only think ?what happend is you get some other players with low shilds that says anyone dies fast and cube not goes down.
but most times you get overpowerd players what handle the mission quite easy.
you get your answer from anyone other try to get so much shild capacity like posible , your shild is your lifegaranty, and in a fragile escort is much more importend.
for myself i will chouse the patrol escort it looks like te best fed escort, if i have read it right it have 4 eng consoles so you can put in 4x armor consoles thats also gives you alot stay alive take low dmg ability.
Sounds like you just had an off day. Sooner or later, everyone does. Had it occurred a second or third time or if there were more than one player achieving the exact same results with a completely different setup and team, then it might be possible they did something to adjust the Cube.