Most people dont remember the few months before Sentinel in 2017 before flaming it on the forums, if you remember it very clearly then you know it works most of the time.
Just because you see a few hackers a day doesnt mean it's broken, when a new hack client releases a bypass, they get free reign for however long it takes our Developer to patch it, these hack devs have their own Discords as well so they can roll out new patches to players on the fly so its a constant battle with them.
Some days Sentinel can be absolutely fire and catch everybody, and others when there is a good bypass it can be failing you, but its always being worked on and the developer is trying his best to keep up.