The A30 and A50 series are fine to be honest, plenty fast for most people. Not sure about the A10 line though

Honestly imo 200€ phones are allright, but you do get what you pay. And the A14 at least here in Germany starts at like 120€, which is substantially below 200€. So if you get it and end up comparing it to an iphone, then it most certainly will look lackluster.

I would say that the sweet spot is probably in the 300-350€ range. There you have a decent amount of selection and get some really solid phones that are good for daily drivers. Like the already mentioned pixel A series that gets you clean software and shoots some of the best pictures. Or the samsung a54/55 that gets you a nice allrounder, which still includes a headphone jack and sd-card slot.

They're acceptable for basic productivity but very sluggish if you're coming from a flagship device. Get an S10 series if you're looking for something cheap and Samsung

The A series is great to be honest.

It's the same as the S series, but for people who don't play high end games or live stream or render videos or don't need to record videos in a high quality that I can't even replay on my other devices.

Samsungs come with excellent Windows support right out of the box, so if Windows is you jam it's a good choice. Not familiar with the A14, though. Would advise against cheap Chinese brands.