Looks week, or is it?

size of pot relative to plant doesn't seem like you would need to water 3-4 times per 7 days. But, if it needs it.. it needs it. So, i'd let top layer dry before irrigating again, just to make sure it is getting enough dryback... upto 1" deep, though you don't have to wait that long. a good wet//dry cycle reduces risk. making sure the substrate is providing enough (if dry, provides nothing) at all times will help yield. these things are in conflict occassionally. If you recently LST'd that could be part of the stress seen, but looks to be more than that... you may need to re-formulate your substrate a bit. i'm not a super soil guy, so i can't help there, but there is clearly some issues in your leaves. Maybe, a less frequent irrigation schedule will clear some of that up. See how it does after fixing irrigation habits.