Ross McCormack has vowed to prove Rangers manager Paul Le Guen wrong after completing his move to Motherwell on a two-year contract.
McCormack poses in his new Motherwell colours
The 19-year-old was allowed to move on after being told he would not figure in Le Guen's first-team plans.
"It's not up to me to say he should have given me a chance, but he didn't," said McCormack.
"I'm disappointed, but these things happen and it is up to me to bounce back and prove a few people wrong."
Motherwell host Rangers on the first weekend of the Scottish Premier League season.
"Hopefully, I can do it on the opening day," said McCormack, who started Tuesday's 1-1 friendly draw with Ross County.
I'm looking to bring in a couple more, possibly three
Motherwell manager Maurice Malpas
"When you are told you not in the manager's plans, you know it's time to move on."
McCormack played 15 games for Rangers, scoring three times, including a Champions League strike against Porto.
And Well manager Maurice Malpas has been impressed with McCormack's development, having seen him at close quarters while coaching Scotland's Under-21 squad.
"Ross was desperate to come here after seeing how well Brian McLean and Graeme Smith have done after Rangers," Malpas told BBC Sport.
"He is coming here to be part of the team, not to be a young player to develop.
"He's a young lad with lots of ambition who we believe can prove he has a bright future with us."
McCormack spent the second half of last season in England's League One, scoring five times in 19 appearances for Doncaster Rovers.
"I saw a big difference in him since he went on loan to Doncaster," said Malpas.
"He came back much stronger and much more mature after playing regular first-team football there."
Malpas is keen to add to his squad further before they leave on Friday for a pre-season trip to Canada.
Finding a replacement for left-back Stevie Hammell, who rejected a new deal in favour of a move to Southend United, is his priority.
"I'm looking to bring in a couple more, possibly three, as we need to increase the size of the squad rather than lose any more," he added.
Malpas would not be drawn on his targets, but they are players presently under contract to clubs in either Scotland or England.