Losing a Battle, Winning the War?

There is always this one class that has an attitude. Every single semester, with no exceptions. The faces change, but the attitude stays the same.
Last semester, this was one of my Monday classes. They were a pretty high level but it seemed that our classes were some kind of a burden for them. I tried to supplement with more interesting and challenging tasks, but no matter what I did they seemed to stay indifferent. When I would offer them to choose what they wanted to do for the next task, they always said that it did not matter to them and they would be okay with anything. They were interested in communicating with each other though, so no problem here.
After some time, I simply gave up on involving them into making decisions about the learning process and left it up to myself.
We had a couple of nice classes (in my opinion), but the majority was so-so. I still would plan good-quality lessons but I stopped being emotionally invested into these students. I would just come, teach and leave. We had a silent agreement: they could keep their attitude but in return, they would not cross the line and do anything to make my job more difficult.

A month ago or so I got the comments from the students I taught last semester. All of them were nice and positive, however, there was a bunch of comments left by the students from the same class that stood out: incredibly heartwarming words that deeply touched me. I could not see the names, only the class code. I usually do not check which class the comments come from, but this time I decided to check.
All of these comments were left by that Monday class.

It made me think how often we have such kind of misunderstanding. It is a well-known fact that there are as many points of view as people.
What I saw was a class with the attitude, a class that did not express their feelings the way I wanted.
What did they see? Apparently, a totally different thing.
They enjoyed our lessons. They said I was a great teacher. They regretted they could not stay in the same class with me for one more semester.
This kind of feedback from them was totally unexpected.
I should definitely try being more attentive and sensitive, and not that quick to judge.


Equal Opportunities and Emotional Investment

I teach 12 groups of students per week. It means teaching and interacting with 94 individuals. I can describe each of my students and give detailed comments on their personality, typical behaviour, difficulties they experience in the classroom, and their attitude to our lessons.

Emotional authenticity and investment, as well as teacher-student relationship, are wide-researched topics in the field of ELT. We all know that our relationship is developing differently with different groups/students, and we are all guilty of having our favourites (I am no exception).

My favourites are groups that consist of smart and fast-thinking students. They love brainstorming; their ideas are more or less broad and interesting to listen to. They love English and enjoy the CLT environment. Finally, they are always eager to learn something new; they accept everything new that comes from me with enthusiasm and start using it immediately. Their level does not matter – their attitude does. No wonder that I, as a teacher, want to give as much as possible to the students in these groups.

Now, one of the things I often repeat to my students is that discussion is always teamwork and that it is up to them to ensure that everyone gets equal opportunities.
What I have realised is that while I am teaching my students about being considerate and mindful of each other, I myself might have broken these principles. I have come to an understanding that I am less emotionally invested in those groups that do not meet the criteria written above. I still care about them, but since they are less receptive and do not seem to be that into what we are doing, I start feeling the same. I do my job as well as I can, but I do not share my knowledge with them as easily and happily as I do with my favourites. I am just not sure if they need or want it.

I know what is happening here is logical and can be easily explained by some theories and backed up with some research, I do. My question is not why, but what should I do to change it and should I even change it or not.
I do not have the answers to these questions, and I am not sure I ever will.