You're not alone GP, I was in same position, 1 length and knackered, took lessons, got shouted at a lot, but eventually got to where I can do a 750M. How, by realising I could either be "quick" for 25M or terminally slow and get there, which I am - last out of the water every time - but more fun on the bike and run passing people!
WW is spot on re breathing, you just have to practice technique to where you can swim relaxed - speed? may never come, but who cares, you'll finish.
Why do I get the feeling that denting Billy Wilsons reputation is something that might be of very little concern to him?
The overall impression I got from the Tough Guy is that all runners are mugs, and the TG will get as much money as possible from them - but that's just my personal opinion, and the reason I wouldn't dream of entering it again.
Perhaps backing off may be the sensible way, TG not known for lying down and accepting the're in any way reasonable!
5 stitches in my left shin - opened up my leg doing one of those Tough Guy/Hellrunner/Turbo Filth/Grim runs.
Think it was the Grim, "running" through the last (luckily) water obstacle, was actually wading slowly when I bumped into a hidden something, felt a bit sore, but carried on to finish, 200 yards, used the bottle of water given at finish to wash mud of my leg and thought, oops, need a plaster!
First Aider looked at it and sent me off to A&E, cleaned up I thought I could see my shinbone, not nice, but stitched up was running again in a few weeks.
Moral of story is - Leave silly runs to those that like them, stick to proper runs (saying that I tripped on a Boxing Day 5 miler, nutted the road, 5 more stitches in my temple, silly old s*d)