Maybe larger gloves.

One thing that I know will help: generate more power. Your weight is distributed over three (five) points: feet, butt, hands. If you increase the load on your feet, your butt and hands suddenly get a lot more comfortable.

On my road bike, my position is quite aggressive, but I am completely comfortable on training rides and during races, because I spend so much time generating a decent amount of power. If I go on a 30 minute ride with my kids, where I average 30-50W, my hands and butt are killing me by the time we get back.