Weathervane effect strong?

Nope.
I would agree if you said rudder effectiveness is not what it should be. 5kt x-wind is 30% of the 172’s max demonstrated. Maximum x-wind component is when rudder authority is incapable of maintaining directional control. Rudder effectiveness in the sim is reduced to the point that without proper aileron input directional control can be difficult. This is not a wind or “weathervane” issue. This is a problem with control surface modelling.

To simulate control pressure increasing with airflow Asobo chose to reduce control surface travel. The result is unrealistic control input is required to achieve the desired result. Same reason accelerated stalls are very difficult to perform. Just not enough control surface travel when under load.

Do not underestimate the importance of aileron drag when controlling an aircraft on the ground.