You can use the 'flag' feature to report that grant to our open dispute bot - https://twitter.com/GitcoinDisputes

From there, if the community feels strongly that this grant is not a public good, Gitcoin may ask the Grant owner to update their grant or remove the grant from the matching pool.

We hope to decentralize this process in the future.

For more on this, see https://twitter.com/owocki/status/1217993123311177728