I can suggest this wording to start:
"In recent weeks, Google has introduced ads for delivery platforms like Grubhub, and group buying platforms like Groupon, which appear directly on individual business profiles, such as restaurants. While advertising is Google's business model, and these ads are clearly labelled, this practice introduces a major cost pressure for small businesses. Customers who intended to order directly are diverted to a third party, where they unknowingly inflict a service fee on the restaurant. Alternatively, they may abandon the order altogether for another restaurant on the 3rd party platform.
Restaurants rely on platforms like Grubhub to introduce new customers, however Google's actions enable them to steal customers which the business rightfully earned with its own marketing investments. As restaurants are contractually bound to provide identical prices, Google knowingly profits from arbitrage by sending customers to these platforms.
Due to Google's dominance in the local search market, business owners cannot rely on a competing search engine if they do not like these terms. Furthermore, if they did choose to leave it would be impossible to delete their profile and prevent Google from diverting customers. Unlike traditional directories, Google's business profiles are owned and automatically created by them. They are not the property of the business that is listed."