Even if you somehow got bad copies, that won't cause discs to fail Verifies or prevent them from playing in a standalone player. They play fine on your PC but not your player, so it's the player. The failures you were getting at the Verifies were at the start of the 2nd layer so those were either problems with the burner or the media or a combination of both.
The player probably has no problem with BD-R SL media. But doesn't like BD-R DL media. Or at least the manufacturer type of the BD-R DL you're using. So, you can shrink DL BD movies to SL discs, then by all means, you know that works.
Now, one thing to possibly take into account, are you burning the same image file over and over again in your tests? There could be a 1 in 100 chance that the image created is bad. You could try recreating a new image and see if that helps.
About the only thing you can do is keep trying media to see if something is tolerated by your player, but most likely you won't find something that works as I still say it's your player.