You are clearly thinking in the wrong dimesnions. SailfishOS can never compete with Android or iOS, or even Windows phone / BBOS for years. They are serving a small niche that want something different and not the same stuff as all others do. That niche seems to grow a bit lately, as people get bored with same stuff in different clothes since years.

This is a small 120+ people company doing an OS, phone and tablet, marketing, sales, lawyers, etc. It's insane if you ever compare it to other big grown OS'es with multi national corporations behind them and hundreds of smaller companys supporting them / codeveloping.