Go shop yourself around. Your new overlords clearly don't care much about loyalty and the old guard is likely already out there. Also keep in mind that you can freely and safely reach for careers virtually unrelated to the one you have now and that you can apply for stuff that you will feel is out of reach - in growing your authority as rapidly as you have your resume will demonstrate breadth and aptitude. Any employer worth their salt will hire an under-qualified problem-solver over a qualified seat-filler, especially in smaller, niche employment.
My wife and I have basically divided our hires into two categories: "employees" and "entrepreneurs." "Employees" will do the job we hire them to do for as long as it's convenient and profitable for them and then they will do the exact same job somewhere else. "Entrepreneurs" are yours for as long as you can keep them busy and challenged and the more you diversify their workload the more valuable they become. No judgement on either group of people: "Employees" just figure their life is elsewhere and this is that job that they knew they'd have to get when they graduated school. "Entrepreneurs" want their daily routine to mean something.
We lose "employees" to family shit or relocation - of the four we've lost, three have had babies and straight-up never came back to work. We lose "entrepreneurs" to greater opportunities - two have gone into practice for themselves (one came back, one moved to Minnesota), two have gone on to get higher degrees (one of them is now at a hospital we transport to regularly, one is coming back).
My wife's guiding principle as an employer is one she learned from her first boss, who we're still in touch with and hang out with regularly: "make sure your employees leave your employ as better people than they came in." We pay for education. We emphasize autonomy. We manage as little as humanly possible. And while I recognize that some bosses just suck, any organization worth working with will recognize that you're contracting for a talented individual's expertise in exchange for reselling it to someone else and the most valuable people to manage are the ones that naturally want to stretch.