Steep seat tube angles for technical climbing might not be such a good idea.
The biggest mistake I see, for when people can't make an uphill move, is that their butt is planted in the saddle.
You should be barely weighting the saddle and be on a hair trigger to snap your butt up and forward and then thrust your bike forward of your centre of gravity.
If you are too comfortable being planted on the saddle, you are less likely to be ready to lift your butt when required.
Choose a saddle position/seat angle best suited for lower gradient gravel and paved climbs, then move forward and perch daintily on the nose for technical climbs.