Hi Ignacio,
I’m a big fan of ground spikes, because they work 90% of the times as intended for me, making the setup quick and don’t need much space in the backpack (with a wine cork as protection). Not exactly the same, but in a similar category goes the Decathlon mast holder.
For the remaining 10%, e.g. with rocky or sandy soil, I always found a solution, for example as shown in the video with the support of the backpack, or simply wedging the spike in a pile of stones.
73 Stephan