It can't be understated how horrendous this franchise was for more than 15 years at developing position player talent. Pitching wasn't great either but I'll just focus on the position players here.
Here's some WAR totals from Fangraphs on the value some notable homegrown (drafted or signed as IFA) players provided the Blue Jays in their career. For those that entered the organization from the year 2000 until players like Gurriel Jr., Jansen, Bichette, Biggio, Guerrero started showing up in 2018, 2019.
Aaron Hill: 12.4 WAR for the Blue Jays
Kevin Pillar: 8.5 WAR
Adam Lind: 7.0 WAR
Travis Snider: 1.7 WAR
Ryan Goins: 0.5 WAR
Dalton Pompey: 0.2 WAR
Eric Thames: -0.1 WAR
JP Arencibia: -0.3 WAR
Moises Sierra: -0.7 WAR
That isn't a complete leaderboard and I'm sure there are a bunch of guys that only played 70 games and put up like 0.6 WAR in their Blue Jays career. I just picked some position players of "note"
THE BLUE JAYS HAVE NOT HAD A HOMEGROWN PLAYER PROVIDE THEM WITH AT LEAST 10 WAR FOR THEIR CAREER SINCE DRAFTING AARON HILL IN 2003
THE BLUE JAYS HAVE NOT HAD A HOMEGROWN PLAYER PROVIDE THEM WITH AT LEAST 10 WAR FOR THEIR CAREER SINCE DRAFTING AARON HILL IN 2003
That might be the worst record in all major NA sports franchises.
Vladdy is going to break that trend this season though.
Maybe I forgot a player but I don't think I did.