Are implying that your brother gave up baseball because of one coach? If so, that's ridiculous.
If you really do the research, on sites such as the hitting forum on this site, you will find many more advocates of rotational hitting than not, especially for more advanced players. Chuck Hoyle has coached many fine players, as have the others mentioned on this thread, but there is no need to bash him out of your own ignorance.
The right advice for anyone looking for hitting instructors is do the research, talk to various coaches and istructors, and find whats comfortable for the individual player/parent. If its not working, then make some changes.