You need to just leave this community altogether. If you're not playing then you know nothing about balance, it doesn't matter how many posts you read or videos you watch. While I will admit there are still issues (there's always gonna be issues, get over it), it doesn't mean things are worse.
Also you're contradicting yourself, you say runes reforged ruined champ/build diversity and then say that it caused instability of the meta. The instability of the meta right now basically means anything goes, so champion and build diversity is through the roof right now. Funnel strategy in Silver, sure. All tanks, let's go. Yasuo adc, bring it. All attack damage champs, who needs ability power. No tanks, cool. No adc's, who needs them.
Considering the changes to the tutorial, leveling system and the ad campaigns they've been working on in youtube, they clearly are trying to bring new players in. Yes they're pushing esports but without the pro scene I really think this game wouldn't amount to much or have the staying power it does.
I think you're just mad because the game is changing period. The crotchety old men want everything to be the same, we should go back to the old SR map and never get another new champion/champion update because clearly they're making everything worse. Hey you know what, we should go back to the old style of supports where they're just ward bots who buy nothing but wards, cast no spells that aren't heals/shields and just run around dropping wards and dying because they've got no real items. You know what, this position select thing getting rid of arguments in ranked champ select is terrible, we should go back the toxicity created by a random chance placing you in last position means you get stuck on ward duty. Rift Herald, horrible, trash it. Loot system, who wants free stuff. Runes reforged, why would I not want to have to spend all your IP/BE on good runes to actually compete. You know what we should do, get rid of all these cool champion skins and go back to the old style recolor skins (Nightmare Cho'Gath, Toxic Dr. Mundo, Deadly/ Swamp Master Kennen, Sonoran Kog'Maw). These updated splash arts are horrible we should have more of the old ones like Nautilus, Kassadin, Malphite, Xerath and Mordekaiser.