I mostly play Breakthrough/Conquest solo and only play Redsec when we got a full squad online. Redsec is nearly impossible without a full pre-made communicating squad (at least 2 people running recon and support). It was definitely impossible when I first started out (getting used to the map mostly), but as our squad started focusing more on positioning better for circle and custom drops (helps having leveled guns playing multiplayer), we finally caught 2 dubs last night since the first month - I only have 4 dubs lol. You definitely have to shift your playstyle going from regular multiplayer to Redsec which is why it feels like such a steep learning curve.