So, no, you didn’t follow any of the advice that was offered in that thread.
You were given a plan in January and choose not to follow it.
The point of continuing is to reach a goal. However, you’ve already said that “realistic goals” don’t motivate you.
So, it’s a conundrum. Aim for unrealistic goals and become demotivated because you’re not reaching them or aim for realistic goals (which is not the same as “mediocre” goals) and become demotivated because you actually can reach them.
In any case, if you follow a well-designed training and nutrition plan for 6-12 months without stopping, you will get phenomenal results. This is 100% true. It sounds like you’ve never actually dialed in your training and diet with a good plan for a long period of time, so it’s not a surprise you’re not satisfied with your progress.