Is top lane the least useful lane?

It's only the least useful because it has the lowest impact on bot lane.

Yes it is least useful. The only way its useful is if youre pushing lane 100% of the time and somehow not dying, which wont happen every game.

Mid = Push wave, gank bot, be back in time for mid wave again. Jungle = Camp bot, counter jungle, camp bot, ggez. Support = Ardent Censor, No ardent censor and youre playing with risks ADC = Win lane win game 100% Top = Win lane, tp bot, get nothing bot, walk back to top, bot die, push wave top, back, prioritize winning bot, lose cs top, fall behind in level top, your adc/support dont know what theyre doing, gg you stalled too long.

I have games on my smurf where im 16/3, 12/4, 11/1, 9/0, yet we still lose because our bot lane will be 1/6 and support is 0/7. The ADC will just 1 shot you, and as a Jayce otp, trying to poke someone when they have Ardent Censor is completely pointless.

Top laners are mostly split pushers and frontlines that want to push the lane and assist in teamfights, which they have to learn how to alternate well. A good top laner will dominate their lane and apply serious lane pressure and then arrive to teamfights when you least want it, a bad one is just a split push bot that will never get enough CS because they die so much.

maybe its a matter of you being better at bot or mid, i mean, when i play top i can be pretty impactful, you know, general op pantheon bullshit, play gressive top, get fed top, roam, roam, roam, but its mostly splitpushing, you gotta play the role you know that YOU can be the most impactful in