Adam is the only one who has requirements other than "spend enough time with him", which I think makes sense given his character. As such, even easy mode doesn't make him easier if you don't meet the other requirements.
To get him, you do need Carlos to come out to you (so Adam questions his own sexuality throughout the semester) but NOT ask you out (which would mean Adam subconsciously considers you off limits). If you follow the hints in the game tips devlog, you can avoid the four critical points with Carlos that would trigger him asking you out, and can otherwise spend as much time with the two of them as possible.
Other than that, you just need to make sure to do well in classes. You can't fail any exams or miss any homework assignments. And don't do anything that would make Adam uncomfortable, such as snooping on his computer or asking him to take you to Q&A.
Good luck, and I'm glad you are enjoying the game, even if it's a little frustrating. :)