Yes, individual Thargoid scout ships are being killed by groups of commanders, or even some commanders soloing them. However, these are the scouts, and all the kills have been either many or one vs. one Thargoid.
When the scouts start spawning in groups/wings of 2-4... or more as they continue to approach, it's going to get a lot tougher. And they may have bigger/more formidable craft for us to deal with.
The war isn't won yet. At best, we now know we have a shot of fighting back.
Hate to be "that" guy but the scouts are a different, much smaller ship (found at a crash site). Interceptors is what we are seeing atm. Though I do agree with your comment