Eh. I haven't seen his dialogue since they apparently tweaked it, but I didn't find it that bad to begin with. There was a bit of a vibe in act 2 like "sorry you're hurt, didn't mean to lead you on, was just being nice" but thats life sometimes. /shurg
The RPGHorrorstory element... eh. I somewhat agree, mostly just in exactly how far along/established in his journey of magic he was. A young prodigy attracting Mystra's attention, and then ruining himself (and endangering others) in pursuit of more, is an interesting twist on the traditional exploration of a Wizard's hubris, the issue comes more from like "yeah, I didn't just attract Mystra's attention, I was a peer of Elminster and one of Mystra's Chosen" (conspicuous failure to mention the magical institutions of his home, EG, the Blackstaff, Vajra, Larael, etc., aside). TBH, just changing his interactions with Elminster to either double down on the implicit arrogance of assuming himself Elminster's peer, or have him be more of a fanboy, a la Karlach to Minsc and Jaheira, would've gone a long way.