I make my own amp pages by keeping JavaScript turned off on my phone. 95℅ of pages work and load instantly. Those that don't, I turn on JavaScript. If I go to those pages a lot I add them to my exception list. Sorry but I'm not an amp believer.
On FF mobile, with the "Toggle Javascript enabled" add-on it takes me 3 clicks to reload a page with JS disabled.
give a try for a day or so. Once I did, I can't go back to keeping it on because the web seems so slow by comparison.