I find it to be very useful in about 90% of ARAM games and quite useful in the mid lane because cleanse can remove any debuff and reduces the duration of any more debuffs for about 3 seconds after, which includes the true damage from ignite. Is there a reason that I just don't understand, or what? 
67chrome2 votesCan Someone Explain to me Why Nobody Enjoys Using Cleanse?
For starters,
because cleanse can remove any debuff
This isn't true.
Cleanse removes certain types of CC, not debuffs in general. The only non-CC debuff it effects is Ignite. Mordekaiser's ultimate, the poisons of Teemo, Cass, Singed, Brand's burn, Malzahar's space aids, Darius's Bleed, and other such debuffs are unaffected by cleanse. Cleanse is not QSS, Cleanse differs significantly from QSS in this regard.
Cleanse doesn't effect a solid amount of CC despite its only use being removing CC. Any type of CC that results in an "Airborne" tag Yasou can ult off of cannot be removed by Cleanse at all. Those aren't even effected by Tenacity, so the post-Cleanse debuff isn't even useful there. Pulls, Flings, Displacement, Knock-Ups, Knock-Backs, all uneffected. Sudo-CC abilities like the terraforming abilities of Anivia, Trundle, and J4 are unaffected as well (even if they push you) as are any persistent ground-effects, which is mostly slowing fields. Iceborne Gauntlet can create those, and there's a solid ~30 champions that can throw some type of CC-inducing thing on the ground you can't cleanse. Suppression is also immune to being cleansed, so it's not QSS fun times vs. Malzahar, Urgot, Warwick, or Skarner.
It's entirely possible to run into a CC-heavy team that doesn't have any CC you can remove with Cleanse. Or just a normal team in general. Out of Alistar, Warwick, Singed, Blitzcrank, Corkie, Yasou, Blue Ezreal, Katarina, Nidalee, Yi, and Vi the only CC you could cleanse from that lineup is Blitcrank's 0.5 second silence.
You can cast cleanse when nothing it can remove is effecting you. This significantly reduces it's ability to actually remove CC, as clicking 0.1 seconds to soon results in basically nothing happeneing - which tends to cause Cleanse to shave off notably less than 100% of the CC duration for anyone who doesn't have pro LCS challenger cleanse-skill uses, making Cleanse pretty unenjoyable to use in general. If it was at least like Kat's ult where you can only cast it when it does something, you wouldn't run into situations were you waste it trying to purge 5 bleed stacks or activate it 0.1 seconds to soon.
Barrier, Heal, and Exhaust (along with any non-mobility summoner) can be cast while any type of CC is active save for Silence or Suppression. If you're knocked-up, pulled, mired in a slow puddle, or even just facing a champion without any CC - those summoner's are useful at prolonging your life. You don't need perfect timing to make them useful either, Barrier can just be activated when you eat CC, Heal allows anyone with the reflexes of a potato to get something useful, as you can activate it 30 seconds after taking damage to make eating that skillshot not count. Also, against a lot of mages like Annie, having more HP is generally more useful than being able to remove the CC from her 100%-->0% QWER burst, because it's still a 100%-->0% QWER burst with CC removal, but maybe a 100%-->15% burst with something like Barrier, Heal, or Exhaust.
All that said - I do like running Cleanse in Dominion, because Teemo is there 100% of the time, and eradicating the little squirrel after removing a blind and mushroom slow is satisfying enough it's totally worth it.
TLDR: Cleanse isn't that good in it's niche, and Barrier, Heal, and Exhaust help in the same circumstances while offering more flexibility and ease of use.
RuGu1 votesI use it in ranked a good bit.
You lose a little early safety, but against a CC team, or god forbid they have an Annie. Its well worth the trade off.
Xaenos1 voteswell you have this
