Hell no, it was a good move. Ukraine gained a huge chunk of territory in one week in August via a BLITZ assault across the border. The russians had conscripts and border police which gave little to no resistance back then. Sine that time, in full 8 months the russians have thrown everything and the kitchen sink AT ANY COST to take it back. Russia has suffered the largest casualties in the past half a year in this very region. Of course it would have been great for the ukrainians if they could have expanded the territory control and made strategic advances but the lack of it doesn't erase Russia's casualties
- and no 10 000 ukrainians won't be killed buddy, there are less than 5 000 in Sudzha right now and most of them will be retreating within the Ukrainian border. There is no risk of encirclement despite the various fake news. The ukrainians have a clear path of retreat and they'll use it very soon.
- of course it's a tactical win for the russians and they have the current political and diplomatic momentum all on their side as Ukraine is getting trashed by it's own friends. But momentum is one thing, winning the whole thing another, you'll have to wait a few more months if that eventually happens