It took me about a weekend to get helicopters a little under control. They require non stop collective and cyclic changes.
In case it’s a flight model bug one thing you can try is from the main menu go to settings, set flight model to classic, start a free flight in a heli, take off, go back to main menu and switch flight model back to modern.
Oh, and make sure sim rate is normal in case you changed it before (start the timer on tablet and check it doesn’t count faster than it should).