How much Units does 70 UC BC crystals usually roll out?

I was saving battle chips to open during the deals last month but since I decided to not buy the deals, I spent all my battle chips (700k) and I feel like I got way fewer units for the number of crystals I opened.

Not sure if that's the usual amount everyone get or I got robbed.
Also, I opened 17x Cavalier Epoch Crystals and go the following
9x 2020 (hunt for Apoc/Prof X/CGR)


4x 2019

4x2018


Not sure if that's the usual amount everyone get or I got robbed.
Also, I opened 17x Cavalier Epoch Crystals and go the following
9x 2020 (hunt for Apoc/Prof X/CGR)


4x 2019

4x2018

1
Comments
This is what i got from x20 UC arena crystals.
and how good is BWDO?