It is sad that you could not get people to help you learn. but i saw that you made it to Gold league so you are doing good. I wish you all the best on your splinterlands journey.
Also, I have been playing for 5 years and i still get on losing streaks, the best advice that I can give is to take note of the battles you lose and try out their line ups, as maybe it is something simple like a new ability that is really good. I do this a lot to keep improving.
Have a great day!