(I'm) just saying idiom
informal（在批评或抱怨时，用于减弱语气）我不过说一下
used when you are making a criticism or complaint, to make it less likely to offend someone
I'm just saying I think it could have been done a little more carefully, that's all. 我不过说一下我觉得这件事可以处理得更谨慎，仅此而已。
Isn't it a bit small for you? Just saying. 对你来说是不是太小了？我只是说一下。