I realize it's subjective but his passes were not good.
Obviously it does happen, but you're wrong that Jazz are "constantly" getting caught up in screens or going under. Although I can't confirm since I'm not in the locker room, it is clear that the Jazz defensive game-plan is to pressure the ball handler (if they are a shooting threat) as much as possible on the screen and concede the midrange by funneling into our beast in the middle. Rubio, Ingles, Mitchell, O'Neale all do this regularly. Burks would always get pulled for the exact thing Dante got pulled for last night.
The Jazz players get caught up in screens all the time. The Jazz defense uses a combination of going over or under screen depending on the shooter and situation. I watched the first quarter again. Here are some basic bullet point plays.
-Mitchell got caught on a screen for the first three and had an early TO.
-Mitchell got caught on another screen and gave up a mid range jumper that Gobert late contested and was missed.
-Ingles made a bad pass to Rudy in traffic, Donovan got lost on another screen and gave up an open corner 3 that missed,
-Donovan and Rudy miscommunicated on a switch after a screen and gave up an open jumper. I think it was Donovan who was out of position but hard to say for sure.
-Ingles went under a screens several times on Brown but never when he shot one.
That was before Exum came in. Exum's plays were the following with either good or bad outcomes from him or others:
-His first play was a TO on an attempted leave pass to Favors.
-Then he was flare screened by a big while in help position which led to Nadir getting a rim attempt after a skip pass. Dante recovered but was beaten slightly off the dribble.
-Then he passed to Jerebko on a secondary break and Jerebko wisely stopped short and reset.
-Dante hit Jerebko for a jumper out of PnR.
-His next defensive possession he almost got beaten back door but noticed in time to recover before the pass was made.
-He made a pass to Ingles who turned it over on an attempted pass to Favors.
-Then he made an entry pass to Favors who bobbled it out of bounds.
-On the next defensive possession Ingles went under on a screen on Tatum and Tatum had an open 3 that he decided instead to pump fake and drive. He missed it.
-On the break Dante made a nice cut and Ingles hit him with a good pass that he missed.
-Exum went under a screen and nothing really came of it. There was a dump off to Monroe who got fouled, but the defense was solid positionally.
-Exum's next offensive possession he ran PnR and made a good read to Crowder who did a half drive and dish to Jerebko for a wide open corner 3.
-Ingles went under two more screens guarding Tatum in the next possession and Exum almost got a steal but lost it out of bounds.
-On the next possession there was a semi break and Exum drove the basket and dished off to Jerebko who threw up a crazy shot that Exum rebounded for a tip in.
- 28-20 Jazz. Exum went under and got caught on a screen and the guy hit a 3. Quin jumped up and motioned to sub him out. 28-23 Jazz.
- INgles has an open layup and throws up a really awkward flip shot that misses. the Jazz foul to avoid a break
Immediately after he is subbed out Ingles goes under two screens on Tatum and gives up a 3.
So basically I'm not really buying terrible, or even bad. He had two clearly bad plays, and one more that I would be ok saying was bad. He also had some nice plays and a ton of steady normal possessions defensively where he didn't really do anything great or bad. I don't think it is accurate to say that the Jazz are always going over and keeping tight with shooters. Dante definitely wasn't the only guy who gave up an open 3 point look and definitely wasn't the guy turning the ball over a bunch.
Edit: I forgot to mention that Rudy wasn't in the game with Exum at all in the first half. He subbed back in when Exum came out of the game.