Sadly true. I've been known to warm those meals up just enough to transfer them to a plate or bowl, and then finish their heating. It doesn't undo the plastic contact that happened when the food was prepared and packaged, nor does it help the with plastic waste problem, but it's better than nothing. Meanwhile, I look for frozens that come in paper fiber trays instead of plastic.

When I find a packaged food that I like enough to buy again, I'll sometimes email the company to let them know I would buy more if they replaced their packaging with something less toxic. My voice alone won't make much difference, but if they hear it from multiple customers, perhaps they'll put it on their roadmap. (This seems like a marketing opportunity, especially now that microplastics and other forever chemicals are getting attention in the news.)

Also, there's always the option of cooking/buying a big batch of food and freezing it in single-serving glass/stainless containers. No plastic at all this way, and the food is often better. :)

Where I live sous vide are pretty common in the readymade dinner section - wonder if they're better for you than microwaving and if we should maybe be doing that instead