To quote myself:
Many years ago, I did my integrated full-time ATPL course at a well known UK flight school, in about 18 months, which obviously included all the flying, (in the UK), as well as the simulator work and all the ground school.
I commuted rather than staying on site, so was up at 0600 every week day, home again at 1800, and after tea, worked until 2200 every week day evening, going over my notes and practicing questions. I also worked a few hours on Saturdays.
I only (just) failed one exam - getting 74% and passing it on the second attempt - and had a very high average pass mark for all the other exams. I might have gone a bit over the top and possibly did a little too much work, but there is a lot of work to get through and I was funding myself through the course, so could not afford to fail.
Did you undertake a similar work load?............ If not, maybe do more preparation?