Our first clue that Moreno wasn't necessarily the best of owners came in an article by Scott Miller of CBS Sports in 2013 about the 2012 season
Excerpt:
Since his first full year as owner of the Angels in 2004, Moreno has fired close to 40 members of the front office, baseball operations department and scouting and medical staffs. The Angels maintain a skeletal front-office staff in many areas, and one of the leanest game-day staffs in all of baseball. If someone is let go, there often is no replacement hired. Moreno is said to gouge hours from his low-paid employees.
As for the club being on-deck to miss the playoffs for a fourth consecutive year, many in the organization thought the team needed more pitching help rather than Pujols during the winter of 2011-2012 when Moreno decided on the Cardinals free agent. After all, the Angels at that point already had a slugging first baseman in Kendrys Morales.
Last winter, many key members of the baseball operations department wanted to make more of an effort to re-sign Zack Greinke, but it was Moreno who steered them to free agent Josh Hamilton.
Though he has spent millions on players, including a record $153 million on this year’s payroll, many people both inside and outside of the Angels organization agree that Moreno’s reign of terror has created obstacles not only impossible for the club to overcome, but ones that have shifted the Angels into reverse.
When the decision was made to pursue Vernon Wells from Toronto before the 2011 season, a move Scioscia is said to have endorsed, it was Moreno, one source says, who threatened then-GM Tony Reagins with a firing if Reagins didn’t consummate the deal within 24 hours. Moreno is described as being chapped at having lost free agent Adrian Beltre to the Rangers roughly two weeks earlier, and that helps explain why, in an agreement that utterly stunned almost everybody in the game, the Angels agreed to pay all but $5 million of the $86 million to a player that Toronto was so eager to offload that the Jays surely could have been persuaded to pay millions more.
“Arte needs to stay out of the baseball business,” one baseball person says. “Arte thinks he knows the game. He doesn’t know the game. He only knows the money, the business side.”
The whole article is pretty interesting... and this was written in 2013. Nine years later... well, things haven't gotten any better.