Example: they sent a copy of his cell phone to the prosecuting attorney on accident and didn't request it back in time, so 2 years of his text messages were used against him.
No, his lawyers were deliberately bad. There is a massive difference.
While no direct evidence, it's almost certain that Jones when to a good lawyer at first who told him that "He was most utterly and unanimously fucked" in which Jones did the you better call Saul and got himself lawyers that would try anything at all to muck up the system. While your first response may be "No bar lawyer would do something that could lose their license", after many years doing computer work in the Texas legal system and seeing myriads of interactions, my response is "Yes they fucking would".
Jones chose poor lawyers because good ones ran away screaming after he told them what he wanted to do.
And the reason his lawyers were so objectively bad was because they all had about 1 month working on the case before getting fired and replaced by a new lawyer.
Meanwhile, the plaintiffs had exactly 1 set of lawyers representing them (1 in TX and one in CT).
I'm not joking when I say that Jones went through about 20 different sets of lawyers throughout the cases. You can listen to his various depositions and there's not a repeat defense lawyer in any one of the depos. I highly doubt they were all just uniquely terrible, especially given how much money Jones has. A few were really terrible (Norm, Barnes). Reynolds was actually one of Jones's better lawyers, he just messed up. Unsurprising given how little time he was on the case.
IIRC, the reason for the phone copy getting shared was because of the case hand-off between reynolds and the previous lawyers. The TX lawyers were CCed when they shouldn't have been. And in the process of getting ready for trial, reynolds missed the email informing him of the mistake.