I don’t look at this as negative as you do. I think the Kurds (SDF) will do their part and will surprise you.
SDF took Manbij (fairly large town) from ISIS with no armor and lost 500 of their soldiers taking it with small arms. It was not a majority Kurdish city, and the local government now is mixed.
Then Erdogan wanted to kill them for it.
I don’t look at it as negative beyond the fact that the Kurds may end up doing all the heavy lifting and the pro-Assad/pro-Putinistas are going to give him credit for what the SDF and US forces did. Hell, many posters on this forum believe that the SDF is a malignant terrorist force and that Assad should crush them. The fact that its the SDF defeating ISIS doesn’t fit their narrative and does not compute. They’re basically in denial about the facts. They seem to think its Putin’s forces taking the fight to ISIS. That’s the type of thing I don’t get.