Ok, this is funny because a couple years ago I posted on here asking if anyone ward gourami ate there plants and EVERYONE said either no or would guess not. lol Where were you then?A fish that can get that big will be able to uproot your plants regardless of how well they're planted or established.
Learn to laugh at it. That's my only advice. Lol
My dwarf gourami devours some of my plants and doesn't touch others. At this point I don't mind and find it funny, but it drove me crazy at first. I started feeding him more veggies and algae based foods in hopes he was eating them because he was craving greens. Didn't work. I think he just has fun doing it.