Strong people usually easier to overcome different challenges than the others
Thinking that good people deserve good things in life, You may sometimes have to doubt that.
There are reasons why strong people in their relationship find themselves struggling.
1, You need to learn how to be in a relationship with strong people and verse vassal.
Strong people are usually very good at being independent, but not everyone knows how to compromise, and some people are afraid of losing their freedom because of the relationship they might have had in the past. Strong people learn and observe and don't want to make the mistake they made in the past relationship.
They are risk takers but usually don't like taking risk when it comes to a relationship. The reason your relationship seems hard to you is sometimes the opposite: it's you who need to rely more on your partner.
2, Strong people need to be able to comprise and learn from others.
Most strong people continue to enter new relationships only to find themselves faced with the same issues from time to time. This will not improve until you understand the lesson you need to know.
Some people forget their own plans and interests when they start new relationships and become totally devastated when these relationships end, and have to build a new life on their own again. Doing things with your partner is good but also have your own dreams just in case things don't work out, so you will not feel you lost it all if there is break up or anything devastating happens.
3, Strong people attract people who need help and because of these it is important for strong people to figure out the right reasons why they are going into a relationship.
Reason why is because after helping your partner, and he or she is successful wouldn't you want to go look for another partner to help or feel drained?
My suggestions are that feelings or thoughts like that shouldn't go towards your partner and you should be able to see your partner as someone that can help you and you can help back.
Also, you shouldn't overdo that, though, because it can make you feel tired and drained, if you think you are the only one making an effort to sustain the relationship, you might have to leave it.