TL;DR: If you don't want to get customized results, stop using Google and look for search engines that focus on users with the same concerns as you.

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Since 2017, it has been almost impossible to avoid showing "any local" results as Google focuses on delivering them. In October 2017, Google announced that they would stop redirecting users to top-country level domains, i.e., google.co.uk, google.es, etc. This implies that www.google.com/ncr stops making sense to be used.

Instead of using the top-country level domain to control which local result will be delivered, Google changed how they control the delivery of customized results. Instead of depending on the URL, it now depends on multiple signals. 

Those signals might include the user's IP public address. The Internet Service Provider assigns this IP and might vary if the user uses a network service like VPN. Other signals come from the search and browsing history and the data that users around a location share with Google "by default" or by personalizing Google product settings, like setting a home and work address in Google Maps.

You might trick Google by using a sophisticated setting to hide your actual location. Google will use the assigned location to deliver results based on it.

Besides hiding your location, you might try to hide Ads, but keep in mind that you might be violating the terms of service and that Google constantly changes its search engine to keep it relevant and to protect its revenue streams. Some extensions help users to handle user-created code (user styles, user scripts, CSS, JavaScript), and there are sites were users share scripts.