Yet? That's generous. String theory (whichever one you choose) works on the Planck scale regime, around 15 orders of magnitude beyond what the LHC can reach. Just scaling the LHC size you'd need...
27km(10^16TeV/14TeV) ≈ 2.710^13 km ≈ 2.4 ly
Sure technology doesn't scale linearly but come on, string theory testing scale is impossible.
I did my MSc and diploma work in pure mathematics inspired by this. then I saw the light and did my PhD in electrical engineering because I felt I was getting a rabbit hole that did not worth it and could ruin my life financially.
Still was convinced that with money and time there was something there. Thanks to all these people that eventually uncovered the scam and gave evidence to see that string theory is indeed a conspiracy theory.