well, you might want to mention the part where he ran for 819 yards -- the 7th most all time in NFL history for a QB -- on 6.2 YPC (second best in the league) and 11 touchdowns, tied for 4th in the league. if he's a top 15 passer while also being one of the most dynamic rushing threats at the position in NFL history... then yeah that's a superstar player, it's pretty easy to see. cam newton and lamar jackson both won MVPs with the combo of above average but not great passing and elite running. welcome to the year 2015.
i have no idea how being 13-17 as a starter two years after being the number 1 overall pick is supposed to be some negative. they've gone from 3 wins the year before he got there to 6 wins in his rookie year and 8 wins last year, while being coached by a guy who couldn't even break .500 in the big 12 and w/ a GM who is one of the worst in the league. PFF has the cardinals ranked as the no. 22 roster in the NFL in terms of talent. here is what they list as the team's strength
Biggest strength: Kyler Murray has given the Cardinals one of the most efficient rushing attacks in the NFL despite not possessing an elite offensive line or running back. Since 2019, Arizona ranks third in expected points added per run play behind only Baltimore and Tennessee. Murray's speed and the attention that defenses have to pay him on read options is a big part of that success. And that doesn't even factor in the danger Murray poses as a scrambler. His 427 rushing yards on scrambles last season were fewer than only Russell Wilson's.
but yeah, PFF had him ranked 16 in passing grade so he's not very good.