"When we came to Syria, we were expecting them to exert some pressure on the regime to accept a political solution," Saleh Muslim, head of external relations for the Democratic Union Party, told the US agency from Qamishlo.
The agency pointed out that Syrian Democratic Forces and with the support of the international coalition to fight Daesh had a big role in liberating the country from "terrorist Daesh organization", where the Autonomous Administration in northern and eastern Syria controls one third of the country.
Russian President Vladimir Putin intervened in the Syrian crisis with the Syrian regime in 2015 and established himself as a key mediator and spokesman for the regime after the Trump administration announced it was planning to withdraw most of the US troops from Syria.
Putin is encouraging Turkish President Recep Tayyip Erdogan to restore ties with Assad's regime, which Ankara opposes, to resolve tensions over Turkey's demand for a buffer zone inside Syria.
"Had the Americans or the international coalition been there, it means it will be safer and they will prevent Turkey's air strikes or attacks," Muslim said in response to a question about how long Washington would stay in Syria.
"The Syrian Kurds presented proposals for a decentralized political system in Syria to Russia in December, but despite Moscow's promises to discuss the idea with Damascus, there was no response from the regime." Muslim said.
Muslim said Russia's efforts to mediate between Syria and Turkey "do not help" to ease Kurdish fears. "They work closely with Turkey and are trying to please Turkey."
Putin is pressing Erdogan to allow a large-scale military offensive against mercenaries who control Idlib province in northwestern Syria.