Default route plan is very bad

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/default-route-plan-is-very-bad/
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1. Go to abetterrouteplanner.com and do not log in (to have default settings)
2. Select car: MG ZS EV 2022 Standard Range
3. Plan a route: Start point: "Ede, Gelderland, Netherlands", point 2: "Clervaux - P+R Gare [Chargy]", end point: "Ede, Gelderland, Netherlands".
4. In Clervaux, set charging 7.4kW until 100%
5. Set the departure time to Nov 7, 2023, 4:30 AM
6. Plan the route

Result: 8h02 (driving 6h24, charging 1h17, 4 charges, costs EUR 47.30).

6. Go to Settings > Chargers & Networks > Avoid and prefer
7. Select Fastned on +1 (1 hand)
8. Replan

Result: 6h56 (driving 5h49, charging 0h52, 3 charges, costs EUR 33.40).

If I select my home address, then the default planning is even worse. Then the SoC value is negative by the first rapid charger.

Why does ABRP not select the best route?