Not true. Not true at all.
Look at Dez's career stats and the number of times Dak targeted him in 2016 & 2017. Very similar attempts to when Dez was younger and targeted by Romo.
Dez career stats:
https://www.statmuse.com/nfl/player/dez-bryant-2621
Dez's body simply started coming down with injuries, specifically his foot injury he suffered in 2015 which kept giving him problems through 2017, hence forcing the Cowboys to cut him after 2018.
The same goes for Amari Cooper. Dak heavily targeted Amari ever since the Cowboys traded for him halfway through the 2018 season. Dak passed heavily Amari's way in 2018, 2019 and 2020. Each season easily over 100 targets.
In 2021, Amari's targets decreased to 68, but Amari struggled most of the season to get open since he was playing with plantar fascitiis all season long, plus he missed 2 games of his own will for refusing to get vaxed, hence had to sit out 2 games when he came up cov positive.
https://www.statmuse.com/nfl/player/amari-cooper-24394/career-stats
It's simply downright untruthful to say Dak refused to target either/both Dez and Amari...and that's why they are no longer here. Just plain false.