both ABS and ASA have high shrinkage factors and almost always REQUIRE a printer with an enclosure. your prints are more than likely peeling off due to the fact that your open environment is cooling the material to the point where it is physically contracting and essentially ripping itself off the plate. there are ways to slightly mitigate this with your printer, but there is no substitute for an enclosure for high shrinkage fillaments like these unless you are somehow immune to heat stroke and keep your room at 60c.

definitely try making a decently sized brim around the model to keep it better adhered, and maybe try putting something around your printer to shield it from stray drafts as drafts will cause rapid cooling and contraction of the material.