Few question,
1. What is your budget (per month/annually)?
2. What exactly do you mean by terrible performance? Low I/O speed? Slow CPU?
3. What plan you used previously at contabo? Storage VPS model "VPS 1400"?
https://steadyturtle.com/ have good reputation and sometimes recommended by other member, but option with big storage only available on dedicated plan.
I don't want umbrel or things running on raspberry, I need to have website with full node.
If you only need to access webpage locally, how about Intel NUC + 1TB SSD?