In Chris Simms's first start, he went 10-20 for 130 yards with 1 INT, 0 TD and was sacked 4 times (Applewhite didn't do much better when he came in, going 5-11 for 53 yards and fumbling on the last drive).
In VY's first start he was 12-16 for 156 with 1 INT, 1 TD. The next game he was 7-13 for 65 yards. The next game he was 8-15 for 68 yards and 2 INT. But VY did run for 100+ yards with a TD or two at least once, if not twice, in that time span.
Colt was 12-19 for 178 with 3 TD. The next game he was 19-32 for 154 with 1 INT, 1 TD. The next game he was 7-8 for 124 and 2 TD.
Sam was 15-27 for 222 with 1 TD. The next game he was 21-40 for 298 with 2 INT, 2 TD. He didn't start the game after that due to injury.
Ewers was 16-24 for 225 with 1 INT, 2 TD. The next game he was 9-12 for 134. He didn't start the game after that due to injury.
Point is, that's five NFL QBs, including two NPOYs, none of whom exactly beat the world in their first few games as the full-time starter. None of them looked polished or consistent, but all of them showed flashes of what they could do. All of them eventually looked polished and consistent (bad games here and there notwithstanding). Four of them could have led a national championship team. One of them did. Aside from that, there's a shitload of difference between a RS-SO and a RS-JR/SR. You can't compare Colt's or VY's or Simms's or Ewer's last year to Arch's first three games. If he's still playing like this in mid-October, then he's not the guy, at least for right now and we had one of those about 25 years ago who ended up winning a title. I'm not saying Arch is going to be VY. I'm only pointing out that VY couldn't beat out Chance fucking Mock, and even when he did he got benched at least twice.