could have been pilot injured, plane damaged or whatever.
the only trim on a 109 is elevator trim.
the rudder is trimmed on the ground. The guy might have been "sliping" to cause an overshot.
But theres to many ifs.
an Easy kill is an easy kill, but the lw were outnumbered so even an experten had a rough time.
I do not too much about Yeager but he was shot down when he only had 1 kill. Most guys in his situation (shot down behind enemy lines then avoided capture to escape back to england) didnt get to fly again.
Not all lw were easy kills

Maj. Wilhelm Steinmann 11+ mustang kills
Ofw. Heinrich Bartels 11 p51s 9 p47s and 14 p38s
on 26 January 1968, Bartels’ Bf 109 G-10 (WNr. 130 359) “Yellow 13” was found at Villip near Bad Godesberg. In the cockpit was the intact parachute...
Obstlt. Heinz Bär 10 p51s
Oblt. Wilhelm Hofmann 10 p51s 13 p47s and 5 b17s
Hofmann led a formation of eight Fw 190s from Drope on a Jabo mission in the Wesel-Bocholt area on 26 March 1945. The formation encountered USAAF B-26s near Münster and he led a bounce of the RAF Tempest fighter escort shooting down one for his 44th victory. However, during the ensuing confusion Hofmann went missing. It was later determined he had been shot down by his wingman and crashed between Hasselünne and Flechum. He had managed to bale out but was too low for his parachute to deploy.