The infamous 100/20 VDSL2 Lines balancing act; 3 tech visits different sync rates each time(posted below):

Hi All,

I've been trying to get my lines working right for a few weeks now. I've reached a point where local tech's are losing control/power on the issue as it seems to be an under lying issue within the network from the corporate office as I've been told. I've sent an informal complaint to the FCC so I've been in touch with the office of the president in efforts to fix the issue.  Especially as I'm hoping to get access to fiber eventually once made available for FTTP and I wouldn't want this outside line issue that is effecting all my neighbors on 100/20 as well to also be an issue in higher tier speeds. Which the person I am speaking with from OOP is very nice I'm afraid their actual knowledge of difference between speed qualities are lacking, so this issue may not be resolved unless I can get some proper guidance.

Little backstory: installed on a move service mid october no real issues just inconsistent speed tests. Originally my connection started to disconnect so we had a tech come out to service and these were the numbers and this was from first week of January:

And here's how the numbers were altered where most errors went away, lines were balanced a little closer after the 2nd tech came(1st tech just called from the box saying everything was ok and it wasn't) This tech explained a problem of the two sources of line coming from outside because these speeds shouldn't be under 40-70mbs on a single line test when the FTTN box is only 200 feet away:

Finally here is after the last tech came just last night, numbers changed slightly errors seem to have gone down further but the balance was further off. Knowing that this is some what "to spec" been told to have SELT tests ran but no tech has actually done so yet. My main issue I'm trying to resolve here is to achieve atleast 20% of the 100/mbs which it's not as I said at times it's under 40 and that is hard wired in on cat6:

Main question(s): Will FTTP connections be effected by this outside line issue? And is it even possible to achieve within 20% range as promised in my contract or am I just wasting my time with this outdated technology? As tmobile 4g LGE towers are within full strength within my location, and they offer home internet, and I can get 110 single line test from them down as it seems like the speed option with the most integrity in the area currently. So I'm strongly considering this route as it is the most competitive option available. That is if ATT's 100/20 is not achievable on a single line test within the range of 20%. Please advise and let me know if you need anymore screenshots; speed tests, pings, traceroutes, or etc. I truly hope to be able resolve this and keep ATT as my main home internet provider. Thanks in advance

Best,
-m