He has completely lost my trust. To me, the only good possibility with Flynn is that he is truly trying to make himself seem like a fraud or grifter for some strategic reason.
That said I have seen so many things meant for evil be used for good. If enough of the public have healthy discernment, these people's lies don't work. If someone like Flynn is a fake, the truths he uses to make himself seem trustworthy are still valuable truths for the normies reading them. So long as their heart lands on those truths and passes over the lies, the person lying has only served to further our cause.
I've seen it happen for years with Ben Shapiro types, obviously now he's lost everyone but the diehard NeoCons but he woke up millions of young people who simply moved on to other sources telling the whole truth instead of halves. If Flynn is a fraud, I'm confident he too will be used for good, by God, whether or not he ever figures it out.