Aggressive AI and their lack of awareness
The AI aggression can really spoil your race and is very frustrating. Perhaps it is more that their awareness of the player car is absent. They force themselves into positions that will often result in the player being hit, often tagging your real wheel and putting you in the barrier - this is very annoying after completing all the practice sessions and qualy session to then have the race ruined in the opening laps.
The most common experience seems to be an AI car tagging your rear wheel which puts your nose into the wall - the AI will then continue to accelerate into the side of you, pushing you along the track.
For context - I have played each F1 game since 2015 on a wheel, in cockpit cam with no assists.
I have found that this issue is present each year when the new game is released.
This year's AI have improved in many ways but the lack of awareness they show is still present.