You completely misread what dude was saying.
He's not denying that Peter isn't popular but among characters created in the past 10-20 years Kamela has become super popular super fast.
Kamela, Miles, and Spider-Gwen have gotten insanely popular relative to how long the characters have been around.
No I didn't. Read what he wrote again. That dude is high as a kite and I'm not the only person that called it out for being ridiculous.
"Ms. Marvel is one of Marvel's most popular heroes..."
This one is heavily questionable. With no TV or Movie appearances to her name (yet), You need to lean on print to get an idea of how popular she is.
And by print she's...not doing that well.
For the month of July, The Ms. Marvel Annual was the 152nd best selling book overall, and the 86th overall best selling title Marvel put out that month with an estimated 15,000 copies.
Issue #5 of the Magnificent Ms. Marvel (this book JUST started, new books tend to sell better than ones on their 15th or 20th issues) was the 164th best selling title, and the 94th best selling title Marvel put out with an estimated 13,000 copies.
This is pretty bad. To give you an idea where Marvel's other titles were that month:
Ignoring team books (House of X and Powers of X were #1 and #2)
Amazing Spider Man #25 was 3rd overall and 3rd from Marvel, with an estimated 113,000 copies sold.
Black Cat was #8 and #3, with an estimated 83,000 copies.
Immortal Hulk was #9 and #5, with about 83,000 copies.
Aero #1 was #12 and #6
Invisible Woman was #15 and #7
Amazing Spider Man #26 was #18 and #8
Venom was #20 and #9
Immortal Hulk was #23 and #11
Loki #1 was #25 and #12
Silver Surfer Black #2 was #30 and #17 with about 47,000 copies
Captain America #12 was #35 and #23
Jane Foster: Valkyrie was #39 #25
Thor #15 was #43 and #29
Sword Master was #44 and #30
Daredevil #8 was #55 and #35
Deadpool was #57 and #37
Thanos was #65 and #40, with about 33,000 copies
Other titles for the month that outsold Ms. Marvel by significant margins? Miles Morales, Cosmic Ghost Rider, Spider Gwen/Ghost Spider, Punisher, Death's Head, Black Panther, Dr. Strange, Captain Marvel, Conan, Superior Spider-Man, and Domino.
Even if you restrict that list to "people only created within the past 20 years" she's still behind virtually all of them.
That being said, the diamond lists have a huge blind spot- they don't reflect titles sold digitally, or through venues like Scholastic. Ms. Marvel is one of those titles that kinda/sorta skews towards younger audiences, and definitely is targeted at female audiences so there may be a decent amount of issues we can't see reflected in those channels.
The only significant titles that did WORSE than Ms. Marvel that marvel puts out were titles that similarly skew towards young women- Impossible Wasp, Squirrel Girl, Moon Girl, Ironheart, and Shuri. Ms. Marvel's team up book (Champions) did similarly poorly, selling at #166 and #95.
She isn't one of Marvel's most popular heroes in print by any means- even if we assume Scholastic is pushing titles. They don't move THAT many copies. Ms. Marvel and the rest of those titles DO hit a demographic that Marvel is looking to grow (young, female, diverse audiences as opposed to 35 year old legacy fans) so they get a bit more rope than traditional titles do.
...the closest thing to another spider man marvel has
This is delusional. There are a LOT of characters that have caught on faster with broader audiences and easily pushed multiple books- Deadpool is the obvious one here. He guest stars in nearly everyone else's titles, carries multiple books by himself, has several videogame appearances including a standalone and two blockbuster films. Deadpool was technically created in 1991, but the concept for that character (basically a deathstroke ripoff) has little resemblance to the modern interpretation which was revamped by Joe Kelly during his 1997 series, 22 years ago.
Captain America and Iron Man after the Avengers hit are somewhat behind Deadpool (though this is a tough one to gauge) as is Venom. If you really want to get nitpicky, Jessica Jones' Netflix series was by all accounts phenomenally popular as was her standalone series (Alias) when Bendis was writing it. It's not currently running, and Netflix never published any ratings for their series, but it's not hard to tag Jessica Jones as also being a stronger IP right now- Jones was created in 2001.
Ms. Marvel is nowhere close to the level of those characters. "But she's getting a TV series so-" Doesn't hold much weight either. So are Moon Knight and the Eternals. current popularity doesn't seem to have much to do with what shows up on screen, and those last two have been bottom basement IP for a VERY long time.
..she is peter parker for the new generation
See the above. PETER PARKER has been the Peter Parker of the next generation since the Mid 1960s. Boomers, Gen X, Millennials...Spider Man is the Spider Man of their generation and this isn't likely to change, with Pete being as popular as he's ever been.