I recently moved into a new apartment with 2 other roommates. Both of them are around 4-5 years elder to me, if not more. They do treat me as a younger colleague. I would have expected that this treatment would be kind – instead, it seems to be the very opposite.
Ever since I moved in, many of my actions are closely scrutinized by them. (Let's call my roommates A and B.) For instance, the first time I took a shower in the apartment, a bit of water spilt out of the bathing area as I hadn't pulled up the shower curtain well (my old apartment didn't have one, so I wasn't used to using it). A posed a generic message on our chat group, asking to take care not to spill water, and to mop it if it does spill. I apologised on the group when I saw the message and said I would mop up the water, and I did. Now it so happens that every time after B takes a shower, I find the bathroom floor extremely wet. Yet, A never seems to say anything about it. I have also not expressed my disapproval because it doesn't bother me.
Another instance is that I once cooked some eggs and the smell occupied the whole kitchen (it's very small and the ventilator doesn't work). I was very sick and so didn't have the energy to do something about the smell. B entered the kitchen with some of his friends later and began complaining very loudly about the stench. He firmly told me to take care of this in the future. The funny thing is, for the whole of the past week B had stunk up the kitchen to high heaven by leaving his dishes in the sink for a long time. I didn't complain because I knew he was busy with some work and thought he would appreciate me being thoughtful.
Apart from this, B plays very loud music almost throughout the day, leaves the toilet without flushing properly, has his friends over who create a ruckus, and A also has his friends coming over creating a huge commotion. I, on the other hand, have nobody over, take care to be silent throughout the day, leave the bathroom clean, and the kitchen too (except in the above occasion as I was sick).
It seems to me that while I am the one quietly putting up with them, they seem to be the ones looking for every opportunity to complain to me about the smallest of things. I'm beginning to feel like a pushover, and I want to tell them that I'm also adjusting with a lot of things I don't like. I am not a confrontational person, and I do have to stay with them for a long time – so I want to do this in a calm, respectful but firm manner. Any ideas how I can do so?
EDIT: A and B had stayed together for sometime (at least 7 months) before I moved in. They do seem to be friends, and I believe they're from the same city, which also seems to create a bond between them. So it is indeed possibly A lets B get away with things.
Secondly, I didn't complaim about these things to them because I was new (this is my third week) and I didn't want to seem too picky. Also, my previous 2 roommates were very adjusting folks and we had mutually realised that each of us put up with certain quirks of the other persons. So I had sort of become conditioned to this mutual adjustment and thought my new roommates would be similar. I thought they would appreciate me putting up with their actions, like my previous roommates did. In hindsight, I realise that this is because my previous roommates were probably extraordinary and I shouldn't expect this from everyone.