I would expect that a protocol such as TCP performs much better than QUIC in benchmarks. Now do a realistic benchmark over roaming LTE connection and come back with the results.

Without seeing actual benchmark code, it's hard to tell if you should even care about that specific result.

If your goal is to pipe lots of bytes from A to B over internal or public internet there probably aren't make things, if any, that can outperform TCP. Decades were spent optimizing TCP for that. If HOL blocking isn't an issue for you, then you can keep using HTTP over TCP.