Assuming a horse is trusting & it's not that they're frightened of being caught, the reason they don't want to is that a) there is nothing in it for them & b) it usually leads to Work and other Bad Stuff. I think getting hung up on whether it's 'disrespectful' in your eyes or such is not helpful.
The simple matter is that if allowing yourself to be caught leads to unpleasantness & nothing much good, why would you do it? Of course, if life is made harder if you don't 'submit', you may choose the easier option(this is how slaves are controlled), but that won't cause you to *want* to come or try hard to 'please' and I wouldn't call it 'disrespect' because you choose not to be hassled when you can get away with it.
'Respect' is one of those terms that seems to have so many different definitions & attitudes about it. It can mean someone is fearful of being 'disobedient' because of repercussions, or that someone feels they have the right to do or demand whatever of another, or it can mean consideration and appreciation for other's views, even if they differ from yours. I personally think of respect as the latter. It's a two-way process that cannot be forced. So IMO it is impossible to *earn* a horse's respect without showing them you respect their attitudes and feelings also.
So in order to teach a horse to come when called, or at very least, to allow himself to be caught, you need to put some time in to teach him it's worth his while & ensure that it doesn't mean Bad Stuff.
I would personally at least start out with food treats, as this is a powerful motivator/reinforcer, although if your horse absolutely loves a good scratch or such, you can do that if you prefer. An effective positive reinforcer is anything that that animal at that time truly desires and will work for(eg. In humans, money & compliments generally go a long way!).
While initially, using food treats as a lure(showing them to the horse to 'bribe' him to come; banging a bucket, whatever) can be helpful to get the desirable behaviour happening in the first place, continuing to do this will not be helpful in strengthening the behaviour, and it also sets up the sort of situation that 'my horse will only com/work for food'. The horse will also learn to do the least possible to get at that food too, such as 'snatch & run'. Instead, put the food treats away and use them(or whatever +R) as a reward for when the desirable behaviour *is already happening*.
I would make a point of doing this every time you go to your horse for a little while, along with avoiding or minimising asking them to do anything they find unpleasant once you catch them for now too. To begin with, I'd just be rewarding them(& negatively reinforcing by backing off immediately after too) for allowing me to approach with a halter in hand. Then as they become good about that, gradually ask for a little more before rewarding them. Eg. Put the halter on their nose before rewarding & removing yourself. With repetition and working gradually toward your goal, improvement and a change of attitude should be steady.
Starting in a small paddock/large pen can indeed be helpful, and a few elec fence tread ins and some tape is a handy thing to have & won't cost much. You can also still use the 'you walk away, you work' tactic too, where you might use a lunge whip or otherwise make it unpleasant when they choose not to come, so long as the horse is not at all afraid of the whip. But it's more important to make it worth their while coming.
I would strive to avoid rushing them or doing anything unpleasant when they're caught until the coming when called, put your nose in the halter behaviour is well established & reliable, but I appreciate that most of us live in the real world and there may be things that just have to be done, or things that we just don't want to pass up. This can cause a bit of a setback, but going back to the routine should ensure it's a minor one. Once the behaviour is solid, then it is fine to pretty much go back to 'old ways' and also not reward the horse too often, but it's best to reduce rewards & 'up the ante' gradually and randomly, not be predictable or change 'cold turkey'.
To ensure this behaviour stays strong and continues, an occasional reward for coming and ensuring what you do with them - particularly what you do as soon as they're caught is generally pretty nice, at least more often than not.