Can we reverse flip a bad low winrate trading strategy?

Lets say we have designed a terrible trading strategy(post idea generation phase), which is resulting in a poor winrate of 20% or less. but we are not risking more than 1% in a single trade and an excellent risk management and position sizing are in place.

Now can we flip the strategy? meaning keeping everything same we will be selling when it signals Buy and Selling when it ask us to buy?

As per quantitative books on trading by good authors - We should not build accidental model/approaches, just to fit our backtest.

However, I feel this is okay as its contrarian? Accidental models are those where step 1. Idea generation is skipped and some random method/technical indicator is used to get a astronomical winrate, which is not in this use case.

Views please?