I attend regular services as best I can. I do this because I feel it is important for my spiritual health and I also believe it is scriptural.
Hebrews 10 NKJV
23 Let us hold fast the confession of our hope without wavering, for He who promised is faithful.
24 And let us consider one another in order to stir up love and good works,
25 not forsaking the assembling of ourselves together, as is the manner of some, but exhorting one another, and so much the more as you see the Day approaching.
Matthew 18:20 NKJV
For where two or three are gathered together in My name, I am there in the midst of them.
Romans 12 NKJV
3 For I say, through the grace given to me, to everyone who is among you, not to think of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith.
4 For as we have many members in one body, but all the members do not have the same function,
5 so we, beingmany, are one body in Christ, and individually members of one another.
6 Having then gifts differing according to the grace that is given to us, let us use them: if prophecy, let us prophesy in proportion to our faith;
7 or ministry,let us use it in our ministering; he who teaches, in teaching;
8 he who exhorts, in exhortation; he who gives, with liberality; he who leads, with diligence; he who shows mercy, with cheerfulness.
What I wonder is why does the offering bother you so much? The church does not require admission to enter or attend the service. The building and services offered outside the worship service have costs. The priest, pastor, or minister who provides his services full time must live on something. The building that the services are held need lights, heating/cooling, utilities, maintenance, supplies, etc. The church also supports others financially through mission work locally and abroad. Our church for example supports local food shelves, Christian outreach programs, visitor centers for immigrants, housing projects, mental health support programs, Christian missions in Africa, India, and Indonesia as well as supporting missions for our own members who wish to get involved to name a few and we are only 60-70 total members.
Throughout the Bible we read about supporting the ministry in both the old and new testament. Growing up in the Catholic church myself I understand that it is a bit more of a closed system but in our Lutheran church the congregation is an integral part of our decision making. Yes, we have a church council to handle most of the "everyday" decision-making but when it comes to how the church funds are spent, that is decided at an annual congregational meeting. Perhaps you should consider joining a church and getting involved to see for yourself how things are done. You may find it an eye-opening experience.
Please don't take offense but if the offering plate is your only reason for avoiding attending worship services regularly, I would say you are leaving out a vital part of your Christian life for a silly reason. Even Jesus, who we should be seeing as our example, attended services regularly.