I think the permaban without notification on first violation (that most violators likely weren't even aware was a violation) is unreasonable. This should almost certainly be illegal if it is not already under the DSA or similar, particularly for a monopolist of Google's scale.
What about this ban is anticompetitive? The only think I can think of is accusing them of dumping product (as opposed to price discrimination), in which case the remedy is going to be to making them charge the API price for everything.