Sounds like folks are used to higher end aftermarket controllers, like a P3, versus what's in the RAM. For the OP, you should begin at the trailer. Make sure the brakes are all in good condition and properly adjusted. Check the electrical connections as crimp connectors are a frequent cause of bad trailer brake behavior. If you're savvy and have a DMM, reading the resistance will really be informative.
You don't give any specifics on your trailer so I'll just say make sure you choose the right configuration, light or heavy electric, when setting up in Uconnect. Then to set the gain, you need a nice flat, stretch of good level paving on a dry day. You want to just barely get lockup travelling at 20-25mph with manual trailer brake activation. That's your starting point and you can tune from there to your liking. In real world travel, you're constantly adjusting the trailer brake gain based on road type, weather conditions, how hot your brakes are, etc. The RAM IBC is more akin to 90s-era controllers versus inertia-based, set and forget controllers dominating the aftermarket of today. However, the RAM IBCs work fine once you understand what you are working with and also appreciate they force you to keep your trailer brake system up to snuff because they're not forgiving.
