It's ok to be angry and very angry, but obviously how we express our anger can be a healthy or unhealthy way. And imho you gotta let it out, talking, venting it great. Physical exercise, journalling, there are many healthy ways. Just don't want to run anyone over on the highway, let your blood boil too high, hurt loved ones, get thrown in jail. We learn frustration tolerance with age or some are luckily born with it.