How to become a better partner?

Don't try to coach him mid-game. Always shout your opponents' position (if they stayed back, if they're on top of the net, etc etc). If your partner misses a few shots straight, stop for a few seconds and tell him to relax and get back to the game. Ask him about what you're doing wrong and how you can both overcome that. All in all, it's really about talking a lot about what's happening, before it's too late.

At the beginning, both of you need to talk a lot in and off the court, so each can understand the way each other thinking.

Ok yeah so about corrections and tips, it's really, really important to make sure the person *wants* your corrections or tips. Sometimes I already know what I did wrong and don't really need someone to reinforce it :D Or other times, someone tries to give me tips but their description doesn't really make sense to me, so it's useless, and then they get even more annoyed when it happens again and they think I am ignoring them. So I'd say that giving unsolicited advice is a really bad idea that will only make you more frustrated. So ask first if the person wants a tip. I would definitely start to get really annoyed with a partner who kept correcting me or giving me unwanted advice! And that would then start to affect our game! Getting emotional when things don't go your way is something you might like to talk to a therapist about - not saying in any kind of condescending way! Just truthful and genuine <3 Things like yoga and meditation can also do wonders! It's a game and should be fun - not stressful! If not doing great in padel makes you feel emotional, that means it's also bleeding over into many other parts of your life, so focusing on relaxation and taking things easy would likely do wonders not only for your padel game but also in general! I started doing yoga a bit over a year ago, and I've recently started sometimes meditating, and it's done a whole lot for my stress levels and ability to take things in stride. Just my thoughts! Good luck! <3

In the long run, you should try to play both sides to better understand the game and the needs or difficulties of your partners. and immediately, what you can do is establish a baseline of what your partner requires/tolerates of you in terms or advice and respect that, some people are ok with constant talking, some want none and more experienced players will require certain pointers as to the position of your opponents. Also, keep in mind one thing, you are giving tips and trying to correct, but how do you know you are in the right?

I don't think a game is the right time to try and change the playstyle of your partner. You've already been playing for months, years, you'll be stuck with what you've learned during that time for the next 90 minutes. If your concern is improvement, then remember that getting the best out of your teammate is also a form of your personal improvement, being a better player also means being a better teammate that brings the most out of the person next to you. It's about body language, positivity,..  When your teammate makes a mistake, he knows he did so, your only job here is to not make that lingering thought worse. That depends on your teammate but I often say nothing at all, just communicate positivity and energy, don't roll your eyes, drop your shoulders or drag your feet, instead you should signal that the focus is on the next point. If they complain about themselves I usually reassure them briefly because these angry outburst are often disguised apologies. Instead of focusing on how you both play, analyze the opponent and talk about their weaknesses and how to exploit them. And discuss issues from the point of a team, never "you" or "me". Then after the game you can discuss where the issues are and plan a training to improve on it.