iPhone 6 latest iOS is crashing apps

The iPhone 6 cannot be upgraded past iOS 12.5.3 and current apps may not run on it. You certainly can go with an Android phone or upgrade your iPhone to a newer model, as the "6" was discontinued in 2016.

Yes, if you feel that way you should. No one here will care since this is a user-to-user technical support site operated by Apple, no Apple management will see your comment. Assuming you mean you updated to iOS 12.5.3 and you are having trouble with certain apps you should 1. Try a forced restart of your iPhone 2. Check how much free space you have remains 3. Try deleting and reinstalling the apps that aren't working 4. Try a restore from your backup.

But since you phone is pretty old a new one would be much faster. And just so you know android is an operating system copied from Apple that is available from several manufacturers. So try before you buy.