I'm never going to say Gary can't be better, or is living up to potential. He could play better, and he hasn't lived up to what his potential is because 2016, 2017, and a good chunk of 2019 show us what his potential is.
But I wanted to look into something, so I looked up his last 4 years, 2018-2021.
Among catchers, there are 32 who have 800 plate appearances, the equivalent of 220 or so games over 4 years.
Here's where Gary ranks:
11th in GP
2nd in HR
5th in RBIs
4th BB%
7th Highest K%
3rd ISO
29th in BA
27th in OBP
6th in SLG
13th in OPS
12th wRC+
12th in WAR
That's with a bad 2018 that was filled with injuries and pretty bad 2020.
Let's just look at Gary this year :
1st AB vs. SP .272/.350/.609 in 92 ABs
2nd AB vs SP .145/.220/.277 in 85 ABs
3rd AB vs SP .240/.345/.600 in 29ABs (Small sample that 1 hit or 1 extra out drastically moves the needle)
1st AB vs RP .210/.340/.407 in 167ABs
2nd AB vs RP 0-8
There's something in that 2nd AB that he's not seeing. And that isn't just a Gary thing, it's up to coaching to figure that out. If you want to go career with Gary
SP 1st AB: .897 OPS
SP 2nd AB: .720 OPS
SP 3rd AB: 1.016 OPS
SP 4th AB: 1.016 OPS
RP 1st AB: .721 OPS
RP 2nd AB: 1.135 OPS
Having a low OPS against Relievers can be attributed to a lot of things, for example Stanton's OPS against a RP is 120 points less than starters.
But for Gary to have a 180 point drop in his second at-bat against a SP he's already seen and has success against, and has even better success if he faces them a 3rd time, there's something off there. What's the difference in approach, what is he seeing, what is he thinking. That's for a GOOD coach to figure out.