[answerly]

>If a company is going to do advertising - they should do it well.

You seem convinced that this ad being targeted to you was some massive failure of Twitter's ad product. I am not sure that is the case.

Premium Twitter advertisers (of which the Sun is surely one) have a variety of targeting options that could explain why you saw this ad.

The Sun may have simply targeted all accounts in the UK. Or, they may have targeted accounts that follow other UK publication accounts (it looks like you follow a few Guardian accounts for example).

It is clear that you didn't want to be targeted by The Sun, but that doesn't mean that The Sun didn't want to target you.