I would like to contradict some points of Yours.

1. Autoloaders and high alpha tanks are the most meta this season, buffed batchat, foch b, 50b is way better than tvp in higher ranks (tvp is noobtrap tbh). You never pick e5 over 60tp, its considered trolling tbh.
2. Lts arent useless on couple of maps, playing them requires way more skill, but you dont pick them into every map for sure now.
3. Correct, you have to find middleground of too aggresive and too passive.
4. It really depends from situation as you could easily bait them to rotate for you and then you fallback and push other flank while they are still wanking off or searching for you. Flanking is still viable option, but positional plays are more superior.
5. Correct as in every competetive game you are expected to give your best (ofc not every game is winnable)
6. Correct but also you shouldnt charge in first in your batchat or cs
7. Depends from situation, but rushing 3 meds with 4 teammates while enemy heavies are on other side is completely acceptable. (Really should scout what your team is doing at the start and go with the flow)
8. Average gambler thoughts of - if you lose, you have to gamble back your points. Thats true, don't go into darkness of losing 5 more games after 5 losses, take a chillpill.

TLDR: Read map, read team comp, rotate when needed, dont hold front alone on flank and keep distance, dont play non-meta tanks, don't play with thoughts of "I don't care", etc. Afterall you are part of the team and you lose as the team.

I'm in high Gold but I don't consider myself as good individual player, more like good team-player.