Fishing for upsets only because of extreme odds (like your history suggests) will get you nowhere in the long run, you gotta pick your battles based on research and expected value. I had to learn this myself after only getting into CS betting recently and since then, between stat sites and discussion here, it's been relatively smooth sailing. Worked my way up from a devastating -$20 or so (fuck you IBP) to +$15.
It's not my full history, but I see how you'd come to that conclusion based on what i've posted lol. I'm definitely looking more into the stats aspects of games now, for the past few bets i've made some calculated choices; additionally, I dont really have/nor would risk the skins for a solid return from 60%+ odds. If they're going to be under a dollar coming back, I'll avoid the bet altogether or make a small upset bet (~25 cents) on the underdog