Sure he starts off hot but by the middle of the season he's slightly above average
Eh not true. First 7 games of last year he played average at best (the Houston, First washington, and Detroit game where 3 of the worst games of his entire career).
We fired Alexander and Tyron literally started playing at an all-pro level after the bye week (lead the league in least amount of pressures allowed, gave up zero sacks, and was ranked top 5 against the run).
He actually does not usually start hot off the bat.