"It's something that, since I have been in charge, I've noticed more and more," he added.
"Everyone wants a successful football club, everybody wants a successful city. The sooner everybody stops being at loggerheads with each other, and everyone takes a deep breath, we can come back stronger.
"That all needs addressing because unless everybody pulls in the same direction it's impossible to be successful."
Supporters have protested against the club's owners throughout the season, citing a lack of spending after several players, including Marlon King, Keiren Westwood, Ben Turner, Aron Gunnarsson and Lukas Jutkiewicz, left the club.
"If I'm able to get players and we do well, then the supporters are happy and everybody is happy.
"The football side of things definitely needs addressing. Everybody I speak to says they want the football club to do well, but there's always obstacles in the way for everybody.
"All that needs sorting out and I'm sure it will be," Thorn concluded.
Goalkeeper Joe Murphy, who was brought in on a free transfer from Scunthorpe United after Westwood moved to Sunderland, echoed his manager's frustrations.
"You can't lose a lot of good players, you need to replace them, you need a big squad in this division.
"Our squad was bare to start with, but it's no excuse.
"I felt through the season that we weren't one of the bottom teams in the division. The table doesn't lie, throughout the season we haven't been good enough," he said.
And defender Richard Keogh, who was sent off in the defeat against Doncaster, took a similar view.
"It's obvious for everybody to see," he said. "When you lose seven players that play in the first team, core players, then obviously you're going to be a weakened team."
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