Is it even possible to get out of elo hell?
First of all it's important to know what your goal is. Let's say top 200 and staying there for example.
Because the only way that is possible is if you play sweaty with a super tryhard build, capable of carrying trash teammates. Here's the deal: in the ELO hell, most of the times you should get enemies that are bad enough that you should be capable of winning against 1.5 players on your complete own without any help from your teammate... IF you play sweaty & optimal. 2 players if the enemies are super bad.
Your army composition must be capable of countering (almost) anything the enemy can build, e. g. never skip AT guns or HMGs in the hopes that your teammate builds it for you.
This is the stuff I am talking about. Barely winning and holding your side isn't enough to get out of these ranks. You need to be capable of completely smashing your side and then flank the other side if you play against bad enemies and matchmaking isn't too fucked. The 3 Western Front armies have it much easier here to pull off these aggressive plays with their strong mainline inf and forward retreat mechanic.
On the other hand, if someone is having a bad understanding of the tryhard meta or slow micro or bad unit preservation etc etc, then it's not possible to escape ELO hell ofc unless you are lucky with matchmaking over a longer period.