The Mini-14 is not a good rifle. Accuracy and reliability are both very poor compared to a bone-stock AR-15; typically you're looking at about 4-5MOA on a Mini-15. Many of the parts are MIM, are are more likely to fail or be out of tolerance than forged and milled parts.

As far as saying that American citizens have access to better arms than the US military... No. Yes, a civilians AR-15 can be better than what the military buys, and civilians usually take better care of their firearms, and don't beat them to shit. But TBH, the AR-15 is one of the best all-purpose mid-sized cartridge rifles out there. Other rifles may be better in some ways, but an AR-15 has very, very good balance between cost, reliability, durability, accuracy, power, range, and weight. Sure, my AR-10 in 6.5 Creedmoor has more power, much better range, and is sub-MOA, buuuuuut ammunition weighs 2x as much and costs 4x as much, my rifle is 1.5x heavier, is 12" longer than a standard M4, and barrel life is about 1500-2000 rounds before it's worn out. (Also, typical infantry firefight ranges are <300y, and often much close than that in urban environments; a long range rifle isn't helpful there.) As far as hunting goes, 5.56x45mm in heavier weight bullets is quite adequate for varmint and mid-sized game at typical hunting ranges.

As far as armaments beyond rifles, American civilians don't have legal access to most of the things that win conventional wars. I can't buy modern artillery shells, or guided missiles. Small arms alone aren't going to win a conventional full-scale battle. OTOH, small arms and IEDs can make occupation impossibly expensive for an invader.

That said - yeah, Lucas Botkin is a far-right christian nationalist homo/transphobic shitbag. T-Rex Arms make great holsters, which sucks, since I'm not ever going to send any money to them for any reason. You have to take a lot of his shooting advice with a handful of salt, because he's not personally that good of a shooter. If you want good advice about how to shoot well, look specifically at people that compete; if a person is telling you how to shoot, but isn't willing to test their own skills on the clock and against other people, odds are that they're full of shit.

And yea - all of the violence is a social issue, and we should be trying to fix those, not banning shit. And by social issue, I don't mean some kind of personal responsibility nonsense, or this garbage idea that we need more harsh deterrents and prisons, more cops, etc.; I mean that we need to stop treating people like they're trash.