Could you please tell us know what kind of dinos you usually face and if something changed that created this loss? If you faced some new dino, we are here to help you and give you an advice on what is your best counter in this moment.
If not, this was either Rng bad luck or people going up / down in the arenas. For these two issue, just close the arena, keep farming dna on your nearby and then come back into battle ater some times.
In any case, see if you can learn some more good strategy from your opponents, be smart, don’t spam your velo or gorgo as openers, keep them as a fast surprise for mid battle, taking out the half dead opponent and prepare the big hit for the one will come out later.
I don’t remember well what are now the current dinos in that arena, if you meet often stegoceratopo, open with an immune dino (as anchilocodonte), and so on.
Hope this helps.