The Union of Utrecht claimed that his ordination had been performed by a wandering bishop. I don't know how that was reconciled or resolved; the communion agreement was made in 2007. On 25 April, AD 2007, at St. Lazzaro Church, Lucca, Italy, the Most Revd Scott McLaughlin, Archbishop of The Orthodox Anglican Church signed a Covenant of Intercommunion with the Most Revd Augustin Bacinsky, Archbishop of The Old Catholic Church in Slovakia. The first paragraph of the Covenant, signed “In the Name of the Father, and of the Son, and of the Holy Spirit,” begins: “Humbly acknowledging the Will of God that all Christians are called to be one so that the world will believe in the Lord Jesus Christ; recognizing our common baptism in the name of the Blessed and Undivided Holy Trinity; acknowledging the validity of our Orders; encouraged by many years of dialogue, cooperation, and friendship between our Churches; wishing to respond to the pastoral needs of our people and to be a more effective evangelistic witness to the world, we, the Bishops of The Old Catholic Church in Slovakia and The Orthodox Anglican Church, in the name of our clergy and people, enter into this covenant.”
If you think that the "Old Catholic Church" is for old and frail people only, you are mistaken. It is for everybody, including the young.
Of course, that does not mean what yu experienced is typical. The first thing to remember is that there are a number of Old Catholic churches and not one. I wonder if you approached them and if you did how. You cannot know their previous experiences with someone who popped in for one service and who they may never see again.
No church should be there to serve just its normal attendees. They are there to serve anyone and everyone. Obviously, there may be circumstances where in a given situation preference may be shown to those who regularly attend the church, take an active part in its life and financially contribute to its upkeep. However, their job is to evangelise. At every church any stranger should be shown a warm welcome. The edict St. Benedict has in his Rule for monks that they should welcome every guest as if he were Christ is something I think every church should try to imitate. Who would want to join a church if they received a very frosty reception? I have been a parishioner at a number of churches where the regulars moan about the fact their numbers are low and how can we build them up. Then when new people join it is quite clear to the newcomers that there is a clique that runs the place and don't you ever expect to become part of it! They are blind to their own behaviour and fail to comprehend why their congregation is small and getting smaller.