Both sides were already relegated from the National League and were playing for just pride at Plainmoor.
Rhys Healey netted a hat-trick for the Gulls but it wasn’t enough as Guiseley left Devon with a 4-3 victory.
Torquay host play-off hopefuls Ebbsfleet United on the final day before a big summer ahead of next season’s National League South campaign.
Owers told Devon Live: ”I am shocked. That's not a representation of me and not of Torquay United fans or the club in any shape or form.
"Sorry is not a big enough word - there isn't a word to apologise for that. It was dreadful. I think that's the lowest point of my career, and it's not about me though.
“I am not making any excuses. I am there to be shot at, and I am being shot at. It's my fault. I have to take the blame, I know that.
“I am going to be a lot happier taking any blame when I get a team that will at least play with passion. Let's get through the rest of the week and move the thing forward.”
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