Unfortunately, the Stalinists, and Maoists (by default) also claim this for themselves.
Now, we both know this is a lie.
But, the fact is that 'Trotskyists' (if we asume identity with the rapidly deformed Bolshevik regime for the purposes of this thread) were not in power for long -- the bureaucracy controlled things almost from the get-go .
So, at best, we had 'power' for a couple of years, allowed it to slip away, and watched as the Stalinists destroyed the revolution (1924-1929).
Not something to put on one's CV, I think.
Since then, zippo.
The Stalinists and Maoists at least have had a few revolutions to boast about since the 1940's.
What can we crow about?