it sure looks like something happened in late 2016 or early 2017 (she was 18 at the time), then there's a gap around 2017 in her online trace, and then from 2018 onwards it's been only getting worse.
now, i've theorised about the causes of Bekah's fuckery a lot, but just to answer your question - i personally think she might have struggled with body image issues as a teenager; then the assault happened, and it might have overlapped with the mental strain of going to the university (the stress of moving and learning how to be an adult on your own for the first time included). looks to me like she's had a particularly hard time around the first half of 2017, trying to deal with how mentally broken she got, and ended up choosing the very unfortunate way of dealing with it we can see in action today.
she started blogging and managing a couple of bullshit positivity for sjw and/or fat morons instagram accounts + some sort of a
digital marketing business in early 2019, i think? and then it all gradually went to shite with low or no activity in most of these places since the end of last year, iirc.