Embrace the idea that winning isn't everything. Debaters who gets winrates likes Oromagi, Ragnar and Ramshutu grow sick and tired of debating because it was a chore from day one where they never really stood for all that much nor flexed their ability all that well.
If winrate and Rating are everything to you, unfortunately it's merely a timing issue. Oromagi, Ragnar and Ramshutu as well as even myself were around when some trolls were here who were easy to defeat, the average debater has improved as this site seems to only retain tryhards in the long-run.
You should begin by asking what winning a debate comes down to, it's not actual logical warfare, it's voter mind-manipulation warfare. Study closely the way people interpret certain 'bad faith' angles vs when they call it a clever Kritik and over time build a repertoire that leads to you being very creative in how you ease the opponent into going for angles and styles of debating that you know voters don't care about or worse, punish.
You want your opponent to seem dull, not necessarily stupid or evil but dull. The audience needs to feel like each Round from you is pure juice whereas each Round from the opponent is some bitter-tasting water-like substance.
Then, after you have done that, of course the Chess elements of debating play a factor. You need to ask what precisely a topic is, wonder how to interpret each word in the title and how to twist your enemy's logic against themselves. Do this and it doesn't matter if you lose, you are essentially going to the gym for your mind with each debate, it will keep you stimulated.