You just finished intern year. As an intern, there is plenty of scut & pain but you are relatively protected. By PGY2 you are far less protected and there are many additional responsibilities that come with the increased trust placed upon you. I also believe, others can correct me, FM requires increasing clinic patient volume with each additional year.
IMHO, "PGY2 senior resident" is some what of a misnomer. Keep in mid the dynamics of a three year residency. By definition, as an intern you require closer supervision and less autonomy. Your PGY3 chiefs, while the most experienced, naturally expect junior resident "coverage". That coverage can not really fall as much on interns. Thus, a PGY2 is declared a "senior" with certain obligations to make the chief residents' lives more enjoyable. PGY2 is the sandwhich year. Other residencies have similar "sandwhich" years....
...I thought it was suppose to get easier so that residents could have a family life or consider having a baby?
No. If ANY residency gets easier with increasing PGY level, it should do so as a result of your increased knowledge, skill and efficiency. It does not get easier out of ~entitlement to an easier life and to facilitate family creation. Each year should be increasing learning and intensity though of different natures. It's called progressive responsibility, a hallmark of all good medical training. When you complete FM or ANY other residency, you are the intern & senior/chief resident all in one.
Most interested in forming families and having kids have done so in just about every residency I have seen. Plenty of ladies have kids during FM & surgery residency. I have even seen women have kids during vascular & CV fellowships. Residency is not designed to facilitate having a baby and forming a family. It is intended to train you to practice medicine. Some residencies may be more conducive to family development... but residency really is not the place for that. A three year residency may however be optimal for finishing "early", getting started with your career and then forming a family.
That all said, most I have spoken to found residency better, albeit different, at each PGY level.