Agree, it seems your rear stabilizer should be trimmed a bit yes.
Maybe the fuselage is bent if it has never been trimmed, and seeks down now ?
Disagree that foils should push up at higher speeds though - for beginner foils yes it is better this way for the first learning period, but when past that, many likes a neutral foil that dont need moving your balance point when going faster.
Even the biggest cambered wings can be adjusted with the right stabilizer to NOT push up (nor down), no matter how high the speed.
Some dont understand this, as they think a wing will always "seek up" when going faster if it is a really lifting wing - but no, it wont, it will just have more drag than a smaller more flat wing, and need a longer fuselage or bigger stabilizer, to be okay easily controllable.