Meshak's routine is either a stupid troll act she can't pull off consistently (why she would do it for so long becomes another question), or it's more than one person (which raises the same question), or she's mentally unbalanced and should be being cared for by family. For me, that's the simplest explanation...she's insane if not demonized. There is NO WAY she can be the way she is here and NOT be the same way in real life. Either her family is not monitoring her closely enough or they're sick of her bitter lunacy, ignoring her and leaving her to bug people online so she leaves them alone.
In any case, she boldly rejects the Gospel of the grace of God as a lie. Unless she repents of that, which shows no sign of happening, she can only get worse.