Confirming The difference between S2-S1 and G5

I have been here a few times, What i can truly take away from these 3 divisions are quite noticeable.

S2 is easy.

S1 is actually difficult.

G5 is easy.

Im not sure what it is about S1, but i have been here playing games for quite some time. And this was like that last season as well. S2 was easy. S1 was hard, THEN G5 became easy! its weird. but thats how ive taken it