Even if you think your teachers weren't shitty, did they have the resources to actually give you the kind of individual, tailored attention that's really important to teaching technical subjects that are very sensitive to variations in learning style.
(fully endorse this thread, to be clear)
like are you "bad at math" or did you just not have it click in your brain due to shitty teachers and you were afraid to fail so you never found it fun or interesting and always blamed it on yourself instead of it being something you're perfectly capable of*
*I'm not talking about dyscalculia lol