"Millennia"? Where did you mention millennia before? And Geralt did defeat people that have probably over 400 years of experience and had many advantages over him, like flight, strength, agility and teleportation. I mean Higher Vampires mainly.
The whole thing about Kimmy's training being equal to about a few thousands of years of obsessive prep?
I don't know if he has same level of body control and senses.
Not really for senses, but his level of skill kinda implies superhuman dexterity.
You can show me what he has dealt with from what I mentioned here. Because fighting something is one thing, but succeeding is another. If they are exactly the same as Geralt's abilities and Travis is able to proficiently dodge these attacks from point blank range, I can accept that point.
Well, as for explosives and general "having to dodge a lot of shit", there's Holly Summers, who shoots dozens of homing rockets at once on a beach that she's filled with covered pits, and also throws grenades with their explosion delayed specifically to trick people into running into them. As for "stunning the mind", he's faced Chloe Walsh, who passively paralyzes anyone within 10
Aard doesn't seem that useful. Travis can stick the landing and immediately get back on his feet, it's a game mechanic in NMH1.
As for Axii, "The effect can wear off over time or be broken via damage from the casting witcher", which gives Travis a possibility of surviving via regen and getting back into the fight. Wiki also says he's not a fan of it and though I'm sure he'll rapidly change his mind, Travis has an autowin button at about 20/30 seconds in.
There's also a chance Geralt might try Somne instead, which gets him cut up since Travis is immune to it, or Igni, which is also resisted though Travis isn't fully immune to it.
To be honest, Geralt isn't stupid. With his senses (and the fact that a glowing sword is obviously suspicious), I'm pretty sure he'll avoid it. He's more of a dodging person anyway. Blocking it with Quen is a safe option.
In the end it's still a huge advantage Travis has even if Geralt works to compensate for it. Is Quen visible? Travis plays a hell of a lot of videogames and he's faced people with forcefields before, he'd know to wait it out. Also, the VSBW page says "Geralt uses it mainly to protect himself from attacks that cover great range/omnidirectional attacks and is not necessarily using it in direct close quarter combat."
As a reminder, if Travis' Instinctive Reaction gives him ONE dodge in melee combat, he gets a huge speed amp and chops Geralt into pieces. If he manages to parry a blow from Geralt, he also gets that speed boost. If his ecstasy gauge reaches its limit, which will take about 30 seconds at most, probably closer to 20, he gets an even bigger speed amp.
To win, Geralt has to not attack with his sword at all as that would lead to Travis likely dodging or blocking- even if he expects someone of comparable skill, Geralt doesn't know about the IR, and has to pull out one of his wins in less than a half minute.