Yeah, of course u can, just get better on macro and micro gaming and get better with 2 champions u like to play it. The most important thing to get stronger is reach a good farming, there are many non-meta monochampions who reaches master or grand master.
Absolutely, it's entirely possible to climb the ranks in League of Legends without strictly adhering to the current meta. While meta champions and playstyles can offer certain advantages, they're not the only path to success.
Yes, it is possible to climb the ranks in League of Legends without strictly adhering to the meta. While playing meta champions can provide certain advantages, especially at the highest levels of play, climbing the ranks is more about mastering the fundamentals of the game and improving your personal skills and decision-making