A timeless, universal sports axiom says the best trades are balanced, helping each team. Well, the big NBA blockbuster Wednesday involving San Antonio’s Kawhi Leonard and Toronto’s DeMar DeRozan has great balance.

Both principals are ticked off.

Leonard reportedly doesn’t want to go to Toronto and DeRozan doesn’t want to leave Toronto — although he ripped Raptors management for a betrayal, so all his warm and fuzzy feelings likely have gone south from The North. Yup, it’s a match made in trade hell.

“Be told one thing & the outcome another,” DeRozan wrote on Instagram early Wednesday after reports of the then-pending deal reached fever intensity. “Can’t trust em. Ain’t no loyalty in this game. Sell you out quickly for a little bit of nothing … Soon you’ll understand. Don’t disturb.”

Both teams announced the trade on their websites shortly after noon. Toronto sends four-time All-Star DeRozan, center Jakob Poeltl and a 2019 protected (1-20) first-round pick to the Spurs for Leonard and guard Danny Green. The pick becomes two 2020 second-rounders if Toronto needs to protect it. Leonard and Green both are eligible to be free agents after this season while DeRozan has three years and $83 million left on his contract. Assuming harmony from all concerned, Toronto seemed to get the advantage.

“Kawhi is a better player than DeRozan so they get better,” one NBA talent evaluator said.

“Obviously, it’s a risk for Toronto if Leonard won’t stay. I’m sure they’ll recruit the hell out of him for next year. I guess their backdrop would be they get off DeRozan’s contract. If Toronto can keep him it’s a good deal for Toronto because they get the best player in the deal,” one rival NBA executive said. “For San Antonio, they get a good player in DeRozan and Poeltl can play, too.”

DeRozan, 28, who averaged 23.0 points last season, reportedly was assured by Raptors officials during the NBA Summer League he would not be traded. Players provided support on social media.

“I’m hurt. My dog gave that city and organization his heart and soul. He was loyal to the soil and got stabbed in the back,” Lou Williams, the Clippers’ two-time NBA Sixth Man Award winner and ex-DeRozan teammate, tweeted.

“Mad respect for @DeMar DeRozan a classy player who has given his heart to a franchise … Giving you away for nothing,” Knicks center Enes Kanter tweeted.

Leonard, 27, has made no secret of his desire to play in Los Angeles, which has a slightly different November climate than Toronto. ESPN, citing sources, reported the Spurs star, who played just nine games last season because of a quad injury, “has no desire to play in Toronto.”

Unless the Raptors deal him at the deadline when his value would decrease as a pure rental, Leonard, the 2014 Finals MVP and two-time defensive player of the year, could be leaving some big bucks behind.

Assuming he stays the entire season, Leonard could get five years and $190 million from Toronto — one year and $50 million more than from anyone else. Due $20.09 million this season, he already declined a five-year, $219 million super-max extension from the Spurs. He can pick his spot after this season. And don’t forget Paul George was going to be a Laker, too, and stuck with the Thunder.

“Kawhi conducted himself wonderfully while he was here,” Spurs coach Gregg Popovich told reporters in San Antonio while labeling reports he and Leonard were feuding as “ridiculous.”

“We wish him well, but at this point, it’s time to move on,” Popovich said. “Kawhi was a great teammate all the way through.”

Toronto fired Dwane Casey, the league’s coach of the year, after another playoff flop against Cleveland. Even with Leonard, Toronto might not make the Finals. One exec said “Boston is the best team” in the East.

Toronto is improved, but enough?

“The Raptors replace an All-Star with an All-NBA player, a two-way player at that. Then they added Danny Green, so they got some experience, some winning but both guys are on the last year of their deals. You’ve got a rookie coach [Nick Nurse]. Are they going to buy in?” the talent guy said. “It‘s a gamble, but Toronto is probably at the point where, ‘We’ve probably only got one more run with this team anyhow so let’s mix it up.’ And if they have to rebuild or retool, they could do it without the [$83] million they owe DeRozan.”