More experienced but stuck in the past with less practice, broken, and physically lesser. He lost because he was broken the guy already explained that. So that was the reason he lost aka not his prime or best.
And his TPM or TCW iteration would fare better in that fight necessarily ?
You don't know since you never saw him. That's my point. With Kenobi, Anakin, and Maul we can gauge their primes across decades. We can't with the others because we only saw them in one era.
We do know? It's mentioned many times in TPM that Jinn was not as strong and fit as he used to be. It specifically states that he compensated for his old age with more experience. This is in the novel.
He tried the same maneuver he successfully killed Qui with so everything you say falls apart when we see him in action.
Because he was going up against the person he was looking for for so long to exact revenge upon. He obviously wasn't going to be mentally at his best fighting Kenobi. Kenobi lulled him in with the Ataru stance, and Maul took that as a weakness. He didn't think it through because he mentally was just hellbent on revenge. This doesn't make him worse as a duelist, it's just him yet again underestimating what his opponent is thinking/planning/can do.
Maul killed him. Maul also took he and his padawan on simultaneously. Maul at his best was superior to Qui at this point.
"Beyond, the Sith Lord worked at binding up his wounds, a series of burns and slashes marked by charred tears in his dark clothing. He was backed to the edge of the chamber beyond, keeping a close watch on Qui-Gon..."
Maul got injured during the fight, multiple times. Which means that Jinn and or Jinn + Kenobi penetrated his defenses on multiple occasions. Not exactly a clear sign of an easy fight, especially if the majority of these wounds happened when Jinn and Maul were fighting alone.
Also note that Maul was "keeping a close watch on Qui-Gon...".
"Qui-Gon was on his feet as well, his own weapon flashing. He catapulted through the opening that led into the melting pit and closed with the Sith Lord, forcing him back, out of the passageway completely."
Note the use of the word force. Maul before this was definitely leading Jinn on towards the melting pit, but this passage indicates that Maul was getting beaten back forcefully as well, at least in this point in time.
"He had found a fresh reserve of strength during his meditation, and now he was attacking with a ferocity that seemed to have the Sith Lord stymied. With quick, hard strokes of his lightsaber, he bored into his adversary, deliberately engaging in close-quarters combat, refusing to let the other bring his double-bladed weapon to bear. He drove Darth Maul backward about the rim of the overhang, keeping the Sith Lord constantly on the defensive, pressing on him steadily. Qui-Gon Jinn might no longer be young, but he was still powerful. Darth Maul's ragged face took on a frenzied look, and the glitter of his strange eyes brightened with uncertainty.
Then Darth Maul back-flipped across the melting pit, giving himself some space in which to recover, gaining just enough time to assume a new battle stance. Qui-Gon was on him in an instant, covering the distance separating them in a rush, hammering into the Sith Lord anew.
These passages show that Jinn matched Maul. Sure Maul won, Jinn as old and tired quickly. But to make Maul 'stymied' (to prevent or hinder the progress of) and 'uncertain' about how the fight was going to play out is quite impressive. Even when Maul back-flipped across the pit, he could barely assume a battle stance before Jinn was already engaging him again.
So if Maul is superior to Jinn, it's quite barely.
Your perception isn't a legit fact that's just you speculating. A guy broken, less practiced, isolated, lost, frailer, and older than he used to be isn't at his best. Why isn't common sense more common.
I know it's speculation. But again you're not really specifying the exact version of Maul where he's at his best.