Dumping a failed beer

It is always a sad day when you have to dump a beer, but for this one it is time to say "good bye". 5 months ago, I got impatient while waiting for ingredients for my barleywine, so I brewed a quick extract batch of English mild.
Numerous things went wrong and in the end, I was unable to save it. I now need the keg space for another beer, so this one goes down the drain.

What went wrong?
  1. Purchased expired wlp002 yeast at a slight discount
  2. Did not use a starter
  3. Had a massive boilover - lost 1/4 of the wort
  4. Ferment took 3-4 days to start. (Probably from #1&2)

The smell out of primary was way off. I would say phenolic. It was sort of medicinal plastic. The flavor matched the off smell and left a plasticky aftertaste. After secondary, the off flavor was not as strong, but it was clear it would not go away on its own. I decided that since this batch was probably ruined anyway, it was time for an experiment.
The wild bugs that ferment lambic and flanders type beers might be able to turn this into something good. They produce other flavors that could cover it up and possibly even metabolize the esters or phenols causing the off flavors. I moved it to my 'sour' keg and pitched the dregs from a couple sour beers. Fast forward 2.5 months and we have...not much better...You probably wouldn't die drinking it, but it is better to dump bad beer than to force yourself to drink something you won't enjoy.

9/39/11. Brew og=1.035
10/9/11. Secondary. G=1.010
10/22/11. Kegged. G=1.005
11/3/11. Moved to new keg and added souring microbes
2/17/12. Dumped keg