You're not actually bad at grammar
In fact you're an absolute natural.
You might not know what grammar you're using.
But if you're communicating and people are understanding you, your grammar is probably correct.
Grammar is the patterns of language
They're innate in us for our first language
For other languages, it can take more work for the patterns to 'stick'
Either way, we tend to do them well
So if you've been secretly worrying for years that your grammar is not up to scratch, let that one go.
Goodbye imposter syndrome. Hello grammar confidence!
Video where I explain why you're not bad at grammar