This isn't even remotely true.
Double teams were a rare thing during the 90s (players beating double teams was even rarer), largely because of the rules deterred them from doing so. Many players during the 90s were allowed to ISO without having to worry about any defensive help (except in the paint). The defensive schemes and awareness of players that Ant has to deal with is infinitely more advanced than what happened during the 90s.
The only string that has most of its fibers infact of what folks think the 90s defense was, is the physicality on post-ups (and even then defenders lacked the footwork to mirror), but everything defensively outside of that is hanging on by a thread. The weak ass contests on jump shots, the half-hearted close-outs, the lack of urgency or knowledge of how to navigate around a screen, the standing around watching players go 1v1, the inability to defend multiple actions during a possession etc.
On the topic of doubles during the 90s though - if you actually go back through some tape, you'd see that whenever teams sent a hard double (obviously because they couldn't send soft help), most of the time they did it without any real intent of cutting off the angles of the ball-handler or plan to stop the possession. It was just sending help for the sake of. There was no attempt to defend the secondary action when the ball-handler passed to his [open] teammate; no rotations or no communication to deal with that. They instead ran around looking lost. Because offensive gameplay back then was almost entirely 1v1s, they rarely had to account for defending all the actions you see today.
In today's game, the help defense Ant sees is a shadow defender situated on his strong stride so he can't dribble-drive, and there's another defender who's in proximity of the open man (whilst staying connected to his own primary matchup), and once Ant picks up his dribble and passes, then everyone adjusts and settles back down to defend the next action. He also has to deal with bigs who're more defensively cognizant, versatile and mobile, and not stiffs who're only on the floor because they're big and fit the profile of a 5/4.
And yes, if he ever hopes to take his game to the next level, he does have to deal with help defense better, but that help defense sure as hell didn't exist during the 90s.