Oxford English Dictionary has the word “crufty”. I find this inspiring.
crufty, adj.[‘Of software: poorly designed, esp. unnecessarily or unintentionally complex; containing redundant code.’]
1981 CoEvolution Q. Spring 29/1 Crufty, poorly built, possibly overly complex. ‘This is standard old crufty DEC software.’
1984 J. Varley in S. Williams Hugo & Nebula Award Winners from Asimov's Sci. Fiction (1995) 178 Routines so bletcherous they'd make your skin crawl. Real crufty bagbiters.2005 C. Stross Accelerando vii. 332 There's lots of crufty twentieth-century bugware kicking around under your shiny new singularity.