Paragons want us to be left without allies.

Or better yet, just to fail completely. That'd make Paragons feel good about themselves.
That's why I don't like the whole Paragon - Renegade system. It's too vague, it's too open to interpretation, it's inconsistent in-game, the gameplay is heavily screwed in favour of Paragons, and on top of it all, there are people trying to claim moral high ground for taking the Paragon route. Both paths can never be equal. The system is flawed at the core, and it has to go.
I identify as pro-Cerberus, humanity-first, and I support the champions of humanity - Shepard and TIM. I support the person who's willing to do what's necessary without becoming desensitized - Mordin. I support the one who's enjoying the carnage while caring for his peope - Wrex. My Shepard's enjoying the battle. It's nice to have someone who can appreciate it.
Loyalty to factions, nations, and people is something concrete. It's not something as vaporous and fictitious as morality. I wish the choice in game would be about loyalty to factions, not about the artificial Paragon - Renegade thing, which doesn't even have a parallel in RL. It's impossible for me to root for something I don't even understand.
I wish the choice would be about choosing our allies. For example:
Humanity-first, whatever the cost, even if it means making nice to the Council and sacrifice your own people to make a political gesture.
Pro-human, and making allies with non-Council species to overthrow the Council - krogan, vorcha, quarians.
Pro-Council, and let the galaxy burn, nobody touches asari superiority. Non-Council species are being extinguished, and nobody cares - the Council certainly didn't.
Chaos-first, pro-human. Support the rachni, cure the krogan, help the geth, unleash the yahg, and let the Reapers handle THIS. Let them face the darkest, most ruthless, most devastating side of Life itself. Whatever it takes to free the Earth, even if means drowning the galaxy in blood. We've already nothing to lose.
Pro-Reapers. Collaborator - inflitrator. Witness the Arrival, embrace the ascension! And then, after you've proven yourself beyond the shadow of doubt, after you've been tested for indoctrination and found fully under the control, when the Reapers have utmost faith in you, their most loyal minion, they're in for a little surprise...
Just pro-Reapers. Impale yourself on a spike and serve your masters in earnest. Starve to death after they're done with the galaxy and leave you here to die.
Support the species of your LI...let them burn if you break up.
Support either Cerberus, or Alliance, or Council, and get equal content for either choice, where each path leads to victory.
Support people, not organizations. For example, support Hackett, and leave the Alliance if he's fired. Support Wrex, and leave the krogan to their fate if they don't accept him as their leader.
The Paragon - Renegade thing being about morality is even sillier. Morality is an artificial construct that ensures that a society keeps itself in balance without resorting to police force all the time. The question is, which society? ME universe is very diverse, and that's what makes it interesting. All the nations have different ideas of morality.
For krogan it's normal to fight and be aggressive, and the greatest insult to the enemy is to be ignored.
For vorcha inflicting and receiving pain is normal communication, since it makes them stronger and improves them.
For quarians it's normal not being able to see each other faces, and they have to risk death for simple contact.
For batarians slavery is normal, and they create the biggest demand on the market for unwilling slaves. (implant violation).
For geth reprogramming is okay, and it's fine for them to switch allegiances in an instant because they've been rewritten.
Applying human morality to all these species? "Benign anthropomorphism."