Huddersfield Town boss Simon Grayson believes the Leeds board's failure to match his ambition led to his exit from the Elland Road club.
Grayson, 42, took over at Huddersfield after being sacked by the Championship side in February.
"You have to improve every year and we didn't spend any money in the summer to strengthen the side," he said.
"If you look at the teams who are doing well in that league they're the ones who've spent a bit of money."
He told BBC Late Kick Off Yorkshire and Lincolnshire: "I think the supporters wanted some money to be spent because they had the foundations of a very good side."
Having helped Leeds to promotion from League One in 2009/10, the former Blackpool boss guided them to seventh in their first season back in the Championship, but he was dismissed following a 4-1 home defeat by Birmingham City.
Grayson continued: "I was disappointed with how it ended because we were in a good place, three points off the play-offs.
"I'm frustrated with one or two things that were said in the papers afterwards that are completely off the mark.
"I suppose when you leave a football club someone has to be blamed and some people shift that away from the people responsible."
Less than three weeks after being relieved of his duties by Leeds, he made the move across West Yorkshire to take over at rivals Huddersfield, an opportunity he says was too good to turn down.
"Huddersfield's a great club and that's the thing that enticed me to go, the ambitions of the chairman, where they are and where they could be in the future," he said.
"Once I met Dean Hoyle my mind was made straight up that I wanted to get back involved and with this club. It was the right club at the right time."
Grayson took over from Lee Clark with the club in fourth position, only four points behind second-placed Sheffield United.
However, after a bright start, the Terriers have struggled for form of late and four defeats in five games mean they now lie fifth, 14 points adrift of United and having to concentrate on promotion via the play-offs.
And with some Town fans concerned about the club's form, Grayson has moved to allay fears that their current form could see them falter at the play-off stage for a third successive season.
"There's always going to be a spell where you're not going to play as well as you can do and it's more difficult because of the great run they were on earlier this season," he added.
"We're focused on what we need to do and once you get into the play-offs anything can happen. It doesn't matter if you finish third, fourth, fifth or sixth."