I think OLA itself is strong enough to destroy the central government, they just need more support for Oromos who sit on the fence. You have to remember - since 2020 things have rampant up, Amahras who used to believe in "Ethiopinimo" are now FANO supporter who want to form their own country or lead the country, it has lead to fights between FANO and OLA everywhere. The tensions in Ethiopia are downplayed but I think once things reach a boiling point there's no going back
Look up #AmharaGenocide on twitter, you will see thousands of Amahra calling for the death of Oromos.
If you go on Tiktok you will see Oromos making fun of Amahras being genocided, for example here is a group of girls dancing and making fun of Amahras being killed. There are thousands of Oromos on social media who do this. Their FKD is next level
