I have been a user on scratch for 6 years. Over that time I have seen scratch turn into a dumpster fire (mostly due to the moderation team consisting of left-ist lemmings who cant control a website).
Now, instead of writing a long explanation on why scratch is bad, Im just going to list all the problems with the site:
The moderators are sensitive as $#*!
Free speech practically doesn't exist
Porn projects! (Granted, most of these are just inflation/vore art, but its still on a kids site)
Constant removal of features. (Remix tree, random project button, camera, exc.)
Guidelines are contradicting to what MIT actually does. Despite the community guidelines EXPLICITLY STATING that constructive criticism is allowed, they ban any and all critizism.
Unfair bans that deal with website outside of scratch's jurisdiction. Examples? The CrummyScratchersWiki, which was a miraheze wiki intended on archiving bad scratchers, and helping them improve. Once scratch found out about it, everyone who contributed to it was banned.
$#*!ty UI.
Neglecting their user base
Taking a $#*! ton of time to respond to ban appeals, only to send a condescending letter to you.
Toxic user base
Site pandering to younger audiences, despite most of the users being 12-18
Featured projects are just the same $#*! over and over again
Popular scratchers are now "TRENDY EPIC LOL RANDOM XDDDD" 9 year olds, instead of talented artists who spend MONTHS into 5 second animations
Please, if ANY teacher is reading this, do not use scratch. Its an awful website, and it consists numerous pedophiles that scratch refuses to deal with. Just use the offline version.