Fans of the Rockies shouldn't be upset with the Monforts; they've been nothing but competent owners who try to win. However, there is nothing they can do about the fact the team is in a location that makes it nearly impossible to have effective pitching.
Of their 30 seasons as a team, the Rockies have allowed 785 (4.85 runs per game) or fewer runs in 9 seasons. In those 9 seasons of allowing fewer than 785 runs, they went to the postseason 5 times and even won a pennant.
By contrast the Brewers, even including the dregs of the mid to late 90s and early aughts, have allowed 785 runs or fewer in 20 of the last 30 seasons. The Brewers have been to the playoffs in only six of those 20 seasons.
It's nearly impossible to consistently pitch well in Colorado, and without pitching its impossible to win, no matter if the owner spends 100 million dollars or 300 million dollars.
Why did Arenado want out of Colorado? Because they couldn't pitch. In 2019, Arenado's last in Colorado, the Rockies were 4th in the NL in runs scored and lost 91 because of league worst pitching which allowed 958 runs (5.91 runs per game).
And it wasn't for lack of investing in their pitching. That particular staff featured the 3rd overall pick in the '13 draft (Jon Gray), the 8th overall pick in the '14 draft (Freeland), the 9th overall pick in the '14 draft (Jeff Hoffman), the 20th overall pick of the '11 draft (Tyler Anderson) plus the 44th overall pick in the '15 draft (Peter Lambert). 3 top 10 picks, 4 first round picks and five starters from near the top of the draft and they still sucked.
If you read Monfort's comments in their entirety, I think he isn't complaining about the San Diego payroll, rather he has a bear-ish view of the Padres pitching and in spite of that San Diego is dumping more money into improving their hitting. Certainly from Monfort's perspective, he has seen that very strategy (overcome poor pitching with plus ultra hitting) fail over and over again.