Hyundai / Kia with the E-GMP platform is likely the current leader in this category. Volvo is strong as well. VW / Audi is likely 3rd, but they have some catching up to do. I feel like they’ll be equally competitive within 5 years or so with the ID platform.
500+ mile range isn’t going to be the goal for a very long time (likely never a goal, but maybe a product of advancing tech in the future).
Drivers vastly over estimate the amount of range that they actually need. The percentage people who drive passenger vehicles 500 miles per day is nearly 0.
200-300mi range vehicles will continue to dominate the market, with the focus being on reducing material costs and increasing charging time (while also improving the fast charging infrastructure).
Can you test your charger on another vehicle? It’s highly possible that your L2 charger has failed.
Also, can you reduce your L2 output amps down to something low, like 16A? If it fails at 16A, then I would argue that the charger has bigger problems than dirty contact points.