Remington has been on the rocks for awhile. Low quality, high prices, and outdated technology. Today's buyer wants a lightened AR-15 with holographic sights, not grandpa's double-barrel shotgun.
I suspect you're being downvoted from the "less gun companies is a good thing" comment.
You would be surprised how popular shooting has become in the US, especially, over the last decade or so, and how diverse the gun community has become.
Not to mention how many new brands there are.
Twenty years ago, you'd walk into a gun shop, and it'd be... well, let's be kind and say "massively sketchy", with a lot of graying beards and a not-insignificant inventory of items with confederate branding.
Nowadays, that's not really the case in most places (which is good!). My favorite range has an espresso bar, and reminds me more of an early-stage WeWork than a gun range.
The median age has trended sharply downwards, and although this data isn't tracked, I strongly suspect that there are a lot of first-time gun owners as well.
Anecdotally, I'm sort of the "liberal gun guy" amongst my circle of friends, and people that I never thought would want to purchase a firearm have been reaching out to me for advice. Which usually starts with "don't buy a gun unless you plan to train with it"
Concerns over civil unrest have significantly factored into this, but there's also things like 3Gun[1][2] (think Ninja Warrior plus firearms) and cowboy action[3] (the same, but with old-timey firearms), which are massively popular.
[1] https://www.youtube.com/watch?v=rPPIhfD5DF0
[2] https://www.youtube.com/watch?v=TRBcQSLgl20
[3] https://www.youtube.com/watch?v=yPMH5RnTqBg