You're not projecting this to the NBA though and not looking at any of the details at all. It's a very shallow look at the game. Let's just look at the Kansas game:
Saying Garrett was great one on one defense is laughable. Pons got blown by and in the NBA that will result in a dunk because everyone is a freak athlete at that level.
2:52 - Pons again gets beat, Vescovi with the hard help, easy catch and shoot. At the NBA level, guys are even more spaced out, so he won't get near as much help when he is on the perimeter.
3:00 - Pons is beat again. Thats a reverse layup or dunk in the NBA.
3:11 - Pretty standard screen and handoff action, Pons I think thought they were going to switch, but not sure whose fault. However, you'll see him get lost on things like this frequently thoughout the season.
7:13 - Blow by on the baseline.
9:51 - Again, Pons in no-mans land on the screen. It's a theme with him and has been for a big portion of his career.
He doesn't have good reps guarding on the perimeter like you are suggesting. He has never been a great on ball defender or team defender. However his freak athleticism and ability to block shots erases a lot of mistakes in college but he won't be able to rely on that in the NBA. Not to mention college doesn't have a defensive 3 seconds, which he would have been called for more than a few times had there been one.
You are really just wrong on pretty much every single one of your observations, it is a little mind boggling. You can literally listen to Jay Bilas talk about Pons defensive acumen in the highlight real.
The Garrett rep wasn't some amazing rep I guess, but it shows his great recovery skills and he made what could have been a clean block.
Vescovi helped off for no reason, Pons had recovered and would've easily kept him in front of him. Freshman Vescovi was over aggressive on help D for no real reason.
Next play, as if. That's getting blocked, he was already in his stance ready to block that when Dotson fumbled it. Dotson knew that he wasn't going to get that off so he changed his mind and lost the ball.
Next play, that looks like a simple switch for Fulky, I can't tell you why he didn't switch that, but no way to tell whose fault it really is.
Next play, I wouldn't say blow by, he looked like he was trying to switch the dribble hand off, but Garrett denied the screen and drives back door. Now that one is not good recognition, but it is not how you described it at all. That does go to your point about getting lost on things, but literally every player makes mistakes like that.
Next play, what are you talking about. He fronted and forces Azubuike to catch the ball further out on the post up, then he levels off Dotson off the screen to prevent him from driving baseline, which forces Dotson into a step back fade away three pointer. Sure he could have been a little closer on the contest, and maybe a NBA star can make that shot, but those are big maybes.
He's not a perfect defender, but he's incredibly versatile. Not being the team's primary shot blocker will help a lot on not having to clean up everyone's messes, therefore he can stay near his man more often. Same thing with defensive 3 seconds. You're really criticizing him for a rule that doesn't exist in college? That's not exactly a hard one to figure out, I mean like most rookies I'm sure he'll get caught a few times, but who cares. Again he'll be near his man more often theoretically so he probably won't be camped out in the lane as much. I've given you plenty of examples of good defense vs guards, you gave me like 1 or maybe 2 examples of him not playing good defense. He'll have to play smarter a times, but he will be able to switch on any screen on the NBA level. He just needs to be less of a liability on offense, and become a little bit better of a rebounder, and he could have a good career.