[verb て-form] + も始まらない
The expression ても始まらない is used to convey that doing something is pointless or won't lead anywhere. It literally means "even if you do ~, nothing will begin (come of it)," implying that the action is futile and one should take a different, more productive approach instead.
It is used when someone is dwelling on something unproductive – such as worrying, complaining, or regretting – and the speaker wants to suggest they move on or take action.
Attach てもはじまらない始まらない to the て-form of a verb:
This expression carries a tone of practical advice or resignation. The speaker acknowledges that the action in question is understandable but ultimately unproductive. It often appears alongside a suggestion for what to do instead, using constructions like 〜~から or 〜~ので.
It is most naturally used with verbs that describe negative or passive behaviors – worrying, blaming, regretting, crying, complaining, etc. It would sound unnatural with verbs describing constructive actions.