Most young folk come on here armed with some dodgy internet knowledge and some nonsense they were told in an LFS and like to think they know it all. Its just the way it is, no one likes to be told they are wrong and it can get heated at times.
Personally you earned my respect when you spent all that time resealing that tank only for it to leak after all your hard work. It was sad to see but your efforts and attitude once it leaked made me think you are certainly dedicated to the hobby and possibly more mature than the first impressions I had of you.