And he would care about that why? Actually, the Seanchan are very popular in the areas they control. That is part of the problem, and why Rand considered a deal at all, and part of what made him re-think the Choedan Kal option for dealing with them.

Well, screw them sideways. He has treated them better than they deserve considering all the balking, rebelling and petulance he has encountered among the Aiel. THEY need him to survive the Last Battle, while his last few major victories have involved precious little from the Aiel. They failed in Arad Domon, he took Illian without their help, defeated the Seanchan twice without them, and his bloodiest fight was against their kind. Oh, and it took Seanchan to help end the last problem coughed up by Aiel intransigence. Sevanna the terrorist, whom the Aiel refused to bend their rules to expeditiously remove, was taken out of play by a Seanchan general! And the Aiel wonder why Perrin was balking at whacking Maseema? He had far more of a claim to Perrin's mercy than Sevanna had when she was wandering unscathed in the Aiel camps near the city her forces had almost destroyed.
The next time Rand slights the Aiel beyond what they deserve, it will be the first time. Sorilea whines that he sees them as merely another spear, but what exactly are the Aiel good at besides mindless violence? The people who kill you for slights to their honor get petualant when told to kidnap leaders and have to be assuaged with meaningless fictions that they are protecting them? No, a subtle and politically significant mission that brings peace is nasty in their eyes! A justified action is when they invade a country and cause tons of collateral damage and kill innocents over a tree.
And if the Wise Ones try to sway the Aiel against Rand for his submitting to the Seanchan, I would expect them to learn why the headband folks call themselves "SPEARS of the Dragon." Remember, if there is a shred of any decency to these overgrown babies, they will recall that the Wise Ones have brought the split and the bleakness on them with their 3,000 years of lies. It was Rand who gave them the truth, and a people with any self-respect and honor should remember that and consult the Seanchan on the proper way to handle female channelers who try to run your nation though underhanded means.

Pfft. Let him. A pittance of men with a starving, collapsing failed state behind them. Great captain or no, there's not a lot he can make out of that.

You mean all of Darlin, who is basically tied hand and foot to him, and would lose any credibility with his own followers if he turned on Rand, who is more popular with the Tairen commoners than any High Lord? What other "rulers?" Dobraine charged into 40,000 Shaido for Rand, and has defied Aes Sedai on his behalf. Berelain & Annoura are firmly under Perrin's thumb. Bashere is the one who negotiated with the Seanchan on his behalf, and urged him to moderation in his campaign goals against them.

Aviendha summed it up best. When push comes to shove, all anyone has to do is show them Trollocs attacking Rand, and they'll line up in a row, bend over and grab their ankles if it will get their armies back home. For the promise of reinforcements and supplementary channelers, they'd tell him that grease is optional. They'd ACCEPT damane if they could be used to hold back the Trollocs.

And Rand's objections still hold true.

Or, here's a wild guess, lets his top echelon of rulers know what he's up to and make the point that he's doing it so THEIR lands won't be attacked while he is leading their troops against the Shadow.