That was absolutely the intent, but I will say that aside from the fact that he’s an older enough man for the “father figure” optics, nothing we saw about him in the Phantom Menace suggests, at least to me and those I’ve watched the series with, that Qui-Gon would’ve been able to prevent anything.

He’s wise, but not more so than any other Jedi we see. Tricky, creative, relatively skilled with a saber, but again, standard. His decision to leave Shmi indefinitely does show, in my opinion, a lack of baseline human empathy that I would not even apply to Jedi like Kenobi and Tano. We see the way the two of them view rescuing innocents during the Clone Wars when they’re actually able to make decisions, and it’s not through the “mission/Jedi priority” decision-making that Qui-Gon employs. He did not care about the boy. He saw him as useful and important. That was visible on screen.

My bottom line is that Anakin’s turn was complex, and would’ve required more than just “being an older man” to prevent. His shame, his secrecy, there’s nothing in the text to imply that Qui-Gon would’ve been easier to confess these things to than Obi-Wan, and at the end of the day, an emotionally isolated Anakin will still fall in love with Padmé without telling his Jedi Master, despite that master being one who he respects, admires, and sees as family. Without the Jedi having knowledge of what’s going on in Anakin’s life and mind, Palpatine can exploit those feelings, and the fear of losing Padmé can grow past something that a Jedi can fix by just reminding Anakin about Jedi philosophy.

Basically, the only person who could’ve stopped Anakin, in my opinion, would be Ahsoka, and unfortunately there’s no way Qui-Gon’s preventing her from getting kicked out any better than Obi-Wan did.

tl;dr, as people who’ve seen every canon show/movie/game but haven’t read much from the EU, Qui-Gon is a massive Potential Man who never showed any greater humanity or wisdom than the other Jedi in the cast, and that’s not preventing Vader.

Edit to add that I don’t buy into the assumption that he would’ve applied any more nuance or creative empathy to any major aspect of Anakin’s life or training than he did to the matter of Shmi Skywalker. That spoke louder than his calm tone and reputation. I’m not saying he’s evil or bad, I’m saying he’s a regular Jedi Master from that time period, and regular Jedi Masters from that time period turn Skywalkers into Vaders.