Just seeking feedback for the following thoughts

I've been Bronze 5ever. I've played since the simultaneous release of Poppy and Udyr way, way back when. I've spent way more money than I've even realized on skins, so I don't want to create a smurf account. I don't want to be one of those "My real account is b3" players while I have a smurf account that's way higher with no skins. I'm just not going to buy anymore skins. The Hextech Crafting System has served me well enough.

Recently, I have thought to improved my mindset as a player who truly is striving to climb. I wasn't serious at all in previous seasons because I objectively denied any and all accountability for the actions I took in game that resulted in bad plays and losses. Everything was either my team's fault, the fault of a single player that isn't myself, a "smurf on the enemy team," who isn't even a smurf, they're just more mechanically skilled than me and therefore outplay me and my team; or, our team comp is trash. It was never me admitting I was outplayed. It was never me admitting I'm not that good. It was never my fault. I was perfect in every way imaginable and I was a model player. (Being Bronze is mentally taxing as you can see.)

Lately, I've improved my mindset. Literally everything is my fault. I've turned my mindset on a dime, did a 180, and have been winning more games. I only play ranked, and I only play solo/duo queue. I've had ally encounters that tell me I'm trash, I'm bad, I look r%%%%%ed when I try to make plays, and after those games, some tell me that they were (Insert a statement about being a smurf or having had a higher tier and division in previous seasons here.) and I just don't see how sometimes. If, in fact you were (X div here,) why do you make the same horrible decisions, mistakes, incorrect build paths, etc our "horrible team" makes?

These people really grind my gears. They make me question whether I know literally any relevant competitive piece of information, such as what to build, when, why, and against who? Where to ward? When to ward. Blah blah etc. I told that guy a thing: "I believe the first step out of Bronze is in the mindset. Is that true?" He said "lol no."

This baffles me a lot. If I'm thinking like a Bronze, I have to be acting like a Bronze. That is just fact, right? I don't even really know where this is going. It just doesn't make any sense to me. If my mindset changes to play to improve, that isn't a Bronze mentality anymore, is it? That's the mentality of someone who wants to improve, and players who improve eventually do get out of Bronze. They lose the Bronze mentality, they lose the low average cs, they cs better than Bronze players, they build smarter, ward better, and have better timing and positioning than other Bronze players, right? How is it not mental before it's physical?