Maybe just back off for a while.
Are you talking mtb in general or just your involvement with trail building?
Personally I'm digging riding as much as ever, probably more. Trail building , well I lost interest. Mostly due to disagreements due to having a different philosophy than some other builders. In the past I had a huge passion for building, cared too much, then got soured, backed away for a bit, settled down, and now I'm back at it in a more healthy way but much less intense about the whole building thing. Point is, letting it go for a while cleared my head, reset my brain if you will - and now I'm back in a much better way.
I resemble this in a lot of ways. Started digging on trails 20yrs ago, and have graduate level education in environmental science so I know a few things. Got involved in a club where a lot of the active builders were engineers who had a wildly different philosophy than me, and wouldn't listen to anything I had to say. The conflicts soured me in a bad way on building so I stepped away from it.
I've become involved in other ways. The main thing I've been doing for the past year is serving as a NICA coach, and I love it. Been getting a little more of a trail building bug lately, and primarily because even though I live in an area with no shortage of mtb trails in general, we simply don't have the kind of facility to be able to host a NICA race and I've started working with a group who's also interested in being able to do that. Being able to bring a NICA race to the area would go a long way, I think, towards getting more kids on the 3 local teams to just try it out, but also make the league more attractive to others in the general region and might help bring more teams online.
I've never fit in with the enduro-bro type of riders/riding all that well. I like riding for different reasons. Hell, I don't race, either, and I mostly enjoy coaching the kids on my NICA team who aren't all that interested in racing. They just sign up for the team for the group rides and skills practice with their friends 2-3 times per week. My favorite rides are the ones where I stop for the flowers, to listen to or observe wildlife, enjoy the view, enjoy a swimming hole, etc. I like long rides and bikepacking (though my fitness has needed improvement now that I live in an area with bigger elevation and higher fitness requirements). It's taken some time, but I'm finding people who like to ride the way I do, and that helps. I still ride by myself or with my wife most frequently, but having that crew with similar interests helps me to avoid getting jaded by the enduro-bros shredding the gnar.