Sounds a little like your low point is too far ahead of the ball for the lag you’re losing by gripping so hard. Do you have a lot of lean too?
My angle of attack is generally steep, and I made a switch to the Taylormade mini at 12° and a stiff shaft last fall to see how it would go. I thought it would get the driver back on track but I stuck with it because I can still hit it fairly long but very straight. Fully recommend taking driver out before you leave the house so you aren’t tempted and then see how it goes. Range sessions are one thing, but finding fairway with a minimal loss in distance might show some promise on the scorecard. You can also replace the 3 wood with another fairway finder hybrid or 4/5 wood, or a utility wedge.