Should I main another role after a whole year of practice?

Im not sure, but Im actually considering to main another role besides ADC after a year of practice on that role. So this is the story:

So Season was ending, I usually play the game for fun, but I decided to try ranked. Ive played ranked before, did terribly bad and ended in Bronze 3 or so. But this time I did fairly well, I was able to climb to B1, but I couldnt get to Silver (lost 2 promos QQ), all with Tristana, a nice ADC I use a lot. Season ended, Preseason started, and right now I feel like im failing a bit with new stuff. You see, I lost most of my games, and the ones I won, I didnt carry at all. Thats my job! To carry, but I never did this last 15 or so matches.

Ive been playing for a year this role, I have 4 champs mastered ( with 100k and the others with 30 k upwards), and I dont blame it on the new patch at all, I think its a fantastic preseason, I blame it on me. My question is, should I try to find a place (item builds, new ADCs to master, more practice) in the ADC role, or should I go and try another one? (I suck at Jungle, im ok with support, and I would probably fly into the Mid Lane if I had to master something else, and I find top pretty boring).

I left my page from Op.gg, also one last thing. Im actually a Latin American player, I accidentally made my account in NA. I have an average of 195-200 ping (previous to server change in Na i had 250 average), thing is, does this affect my game in any way?

Please Id love some advice.