So rather than being discouraged by some negative replys from senior ranking members, let your mistakes serve as your motivation.
I think each and every one of us, when we get registered to the forum, experiences times when we nearly give up thinking that the way the senior rank members reply to our post is not joyful, however, they are mistakes that newbies made, and that's the only way they can be corrected, in my opinion, so they do that for you to know your mistakes, not to discourage you but rather to motivate you. As someone who is ready to learn, I think those replies will serve as motivation. Thinking about those high-ranking members, you can just say to yourself that they also started as you did, and if you put in more effort and do the needful, one day, with time and patience, you will also be there.
One other thing that's motivated me is the posts from high ranking members, so sometimes instead of rushing to reply I take my time in going through the profile of these members to see their post and take note of those quality contents that got them merited by others,
It's great that you're interested in accomplishing such things; nevertheless, it's not simply a means for being deserved and moving through the ranks the next by learning how quality their post is to get create your own too; it's also a source of motivation and some knowledge you'll gain by reading some senior members' posts. And yes, it's not good to rush everything on the forum. It's good you don't rush in your replies there thread that even if you go there you don't need to even reply but read what senior members contribute there, and you can see that you're moving gradually the fact that you're still in the learning process.
However, merit can only be obtained by generating high-quality information that will increase awareness, knowledge, on the forum and I believe you will be getting merited naturally.