In this case it's a horrible thing that they didn't surrender sooner, when it was clear that they were completely cut off and that their cause was hopeless. They held half a million citizens hostage, leading to the death of who knows how many. The entire city was leveled because these faggots made every building a military target. Likely thousands of their own men died over nothing.
If they had all surrendered as soon as Mariupol was surrounded, and the evil Russians went on to rape them, skin them alive, and eat their livers, they objectively would have done more good for Ukraine than they did by fighting. The city would still be standing, the civilians could go on living as they had before, and the Chechens would've had infinitely less clout with Allah because they wouldn't have been able to ackbar as much.