Brilliant. Lots and lots of people with depression can't do that no matter how important it is.
I don't even think Kaladin is that emo is this chapter. We all know he's crap at dealing with failure, but he IS keeping it together to deal with the important aftermath of failing to beat the storm and investigate the one place people are likely to go to hide. That guard is NOT capturing him, Kaladin has an instant shardblade but going in guns blazing is, I find, very rarely a good way to gauge a situation, and what's the poor guard done to deserve a beating? If Kal produced Syl, why wouldn't the guard attack him and basically force Kaladin to hurt him