Depends what age you're talking here. U17's and upwards, aye, scream in their faces and tell them they're playing shite football and it needs to change.
If you're talking younger years (if the scorelines are 17-0 then I'd assume young children) then I'd completely disagree that the "coaching system is fucked" because they're not tearing them a new one for getting beat. If weans were getting fucking roasted for getting beat at football then you'd fine that the majority would pack it in immediately. It's a far better approach to let them move and forget such drubbings, whilst working on the mistakes in a less than aggressive manner.