Do I admit that there is RNG in WoW, especially in Legion? lol.
Does that mean that strangers are responsible for setting group finder requirements to suit me, because I want to be in their group and I refuse to make friends or join a guild? Again, lol.
As I said before, Group Finder is free market group matching. If you want socialized group matching, join a guild.
Gearing is easier than it's ever been. RNG is RNG, but the odds will eventually even out. You can absolutely gear to 900 in very little time and without being carried. I've done it on two alts and plenty of others in these forums are saying the same thing. We're not all making it up.
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Here's another one for you:
Furrycane-Stormrage. He's 898 and still never set foot in H, never even cleared N. I barely play him atm, only logging him to flip table missions, do world bosses, and the occasional emissary or invasion. I don't even do M+ on this one (although I did do a couple M+ when I first dinged 110 - maybe two or three weekly chests total).