To add to what ShadowFlarez said, "Legendary Pokemon" is ultimately a pretty loose term, you'd have to base what you consider a legendary off of the in-game categorization of Pokemon, which is incredibly arbitrary.
You mentionned both Raging Bolt and Gliscor as being annoying, when neither of them are legendaries, Game Freak classifies "Legendaries" as:
1. Sub-Legendaries (Legal)
2. Legendaries (Banned)
3. Mythicals (Banned)
Your proposal would be to supposedly ban the two later categories, which include the following legendaries:
- Cosmog
- Cosmoem
- Necrozma
- Calyrex
- Kyurem
- Zamazenta
Three of these options are clearly not a problem, with Necrozma only holding a slight niche in OU. OU has as a base rule to always ban box legendaries, since they're typically much more powerful then the other counterparts.
While for mythicals, your proposal would only ban the following Pokemon:
- Mew
- Jirachi
- Phione
- Manaphy
- Darkrai
- Shaymin
- Keldeo
- Meloetta
- Diancie
- Hoopa
- Hoopa Unbound
- Volcanion
- Zarude
- Pecharunt
None of these pokemon with the exception of Darkrai are even close to being broken in OU. We've already banned the Legendary Pokemon that
are problematic. While you may have gripes with a few of the Pokemon listed, there's no reason at all to do a blanket ban over the entire category because of a few outliers.
I can understand not liking a higher power level, and that's ok! This is why lower tiers exist, you'll see less powerhouses in lower tiers like UU, RU and NU, if you personally want to play with no legendary Pokemon, some of these lower tiers have very little ones compared to OU.